Newsgroups: alt.revisionism
Subject: Polish Report on Cyanide compounds, Auschwitz-Birkenau
From: The Nizkor Project
Summary: The 1994 report from the Cracow Institute for Forensic
Research on the chemical analysis of cyanide compounds at
Auschwitz-Birkenau
Archive/File:
pub/orgs/polish/institute-for-forensic-research/post-leuchter.report
Last-Modified: 1996/01/12
[typos mine. knm]
A STUDY OF THE CYANIDE COMPOUNDS CONTENT IN THE WALLS OF THE
GAS CHAMBERS IN THE FORMER AUSCHWITZ AND BIRKENAU
CONCENTRATION CAMPS
JAN MARKIEWICZ, WOJCIECH GUBALA, JERZY LABEDZ
Institute of Forensic Research, Cracow
ABSTRACT: In a widespread campaign to deny the existence of
extermination camps with gas chambers the "revisionsits"
have recently started using the results of the examiantions
of fragments of ruins of former crematoria. These results
(Leuchter, Rudolf) allegedly prove that the materials under
examination had not been in contact with cyanide, unlike the
wall fragments of delousing buildings in which the
revisionists discovered considerable amount of cyanide
compounds. Systematic research, involving most sensitive
analytical methods, undertaken by the Institute confirmed
the presence of cyanide compounds in all kinds of gas
chamber ruins, even in the basement of Block 11 in
Auschwitz, where first, experimental gassing of victims by
means of Zyklon B had been carried out. The analysis of
control samples, taken from other places (especially from
living quarters) yielded unequivocally negative results. For
the sake of interpretation several laboratory experiments
have been carried out.
KEYWORDS: Gas chambers; Auschwitz; Cyanide compounds;
Revisionism.
Z Zagadnien Sqdowych, z. XXX, 1994, 17-27
Received 8 March 1994; accepted 30 May 1994
As early as the first years after the end of World War II
single publications began to appear in which the authors
attempted to "whitewash" the Hitlerite regime and to call
various signs of its cruelties into question. But it was not
till the fifties that the trend may be defined as
"historical revisionism" arose and started developing; its
supporters claim that the history of the World War II has
been fabricated for the purposes of anti-German propaganda.
According to their statements there was no Holocaust, i. e.
no mass extermination of Jews and in that case the Auschwitz-
Birkenau Concentration Camp could not have been an
extermination camp - it was only a "common" forced labour
camp and no gas chambers existed in it.
Historical revisionism is now put forward by members of
various nations, who already have their own scientific
circles, own publications and also use the mass media for
their purposes. Up to 1988 the ,"revisionists''<1> most
frequently manipulated historical sources or simply denied
the facts. Then, after the appearance of the so-called
Leuchter Report (2), their tactics changed distinctly. The
above-mentioned Report, worked out on the basis of a study
of the ruins and remains of the crematoria and gas chambers
at Auschwitz-Birkenau, has been considered by them to be
specific evidence in support of their allegations and
evidence of judicial validity at that, since it was
commissioned by the court of law in Toronto (Canada). F.
Leuchter, living in Boston, worked on the design and
construction of gas chambers still in use to execute the
death penalty in some States of the USA. This is considered
to give him authority to take the role of expert as regards
gas chamber issues. In this connection Leuchter came to
Poland on 25 February 1988 and stayed here for 5 days,
visiting the camps at Auschwitz-Birkenau and at Majdanek. In
his report based on this inspection he states that "he found
no evidence that any of the facilities that are usually
alleged to have been gas chambers were actually used as
such". Moreover, he claims that these facilities "could not
be used as gas chambers for killing people" (Item 4000 of
the Report).
Leuchter tried to confirm his conclusions with the help of
chemical analysis. For this purpose he took samples of
material fragments from the chamber ruins to subject them to
an analysis for hydrogen cyanide, the essential component of
Zyklon B, used - acc. to the testimony of witnesses - to gas
the victims. He took 30 samples altogether from all the five
structures used formerly as gas chambers. At laboratory
analyses performed in the USA the presence of cyanide ions
at concentrations of 1.1 to 7.9 mg/kg of material examined
was found in 14 samples. He also took one sample from the
delousing building at Birkenau, which he treated as a
"control sample", and in which cyanides were found to be
present at a concentration of 1060 mg kg of material. The
positive results of the analyses of samples from the former
gas chambers are explained by Leuchter by the fact that all
the camp facilities were subjected to a fumigation with
hydrogen cyanide in connection with a typhoid epidemic which
really broke out in the camp in 1942.
A later investigation, carried out by a G. Rudolf (4),
confirmed the high concentrations of cyanogen compounds in
the facilities for clothes disinsectization. This may be so
since, being undamaged, these facilities were not exposed to
the action of weather conditions, especially rainfall.
Moreover, it is known that the duration of disinsectization
was relatively long, about 24 hours for each batch of
clothes (probably even longer), whereas the execution with
Zyklon B in the gas chambers took, according to the
statement of the Auschwitz Camp Commander Rudolf Hoess (7)
and the data presented by Sehn (6), only about 20 minutes.
It should also be emphasized that the ruins of these
chambers have been constantly exposed to the action of
precipitation and it can be estimated, on the basis of the
climatological records, that in these last 45 years or so
they have been rinsed rather thoroughly by a column of water
at least 35 m in height (!).
In our correspondence with the Management of the Auschwitz
Museum in 1989, not knowing the Leuchter Report then, we
expressed our anxiety as to the chances of detection of
cyanogen compounds in the chamber ruins; nevertheless, we
offered to carry out an appropriate study. At the beginning
of 1990 two workers of the Institute of Forensic Research
arrived on the premises of the Auschwitz-Birkenau Camp and
took samples for screening analysis: 10 samples of plaster
from the delousing chamber (Block No 3 at Auschwitz), 10
samples from gas chamber ruins and, in addition, 2 control
samples from the buildings which, as living quarters, had
not been in contact with hydrogen cyanide. Out of the 10
samples from the delousing chamber, seven contained cyanogen
compounds at concentrations from 9 to 147 ug in conversion
to potassium cyanide (which was used to construct the
calibration curve) and 100 g of material. As far as the
ruins are concerned, the presence of cyanide was
demonstrated only in the sample from the ruins of
Crematorium Chamber No II at Birkenau. Neither of the
control samples contained cyanides.
When the dispute on the Leuchter Report arose, we undertook
a closer study of the problem, availing ourselves, among
other publications, of J. C. Pressac's comprehensive work
(5). In consequence, we decided to start considerably more
extensive and conscientiously planned reaserches. To carry
them out, the Management of the Auschwitz Museum appointed
their competent workers, Dr F. Piper (custodian) and Mr W.
Smrek (engineer) to join the commission, in which they co-
worked with the authors of the present paper, representing
the Institute of Forensic Research. Under this collaboration
the Museum workers were providing us on the spot with
exhaustive information concerning the facilities to be
examined and - as regards the ruins - a detailed topography
of the gas chambers we were concerned with. And so they made
it possible for us to take proper samples for analysis. We
tried to take samples - if at all possible - from the places
best sheltered and least exposed to rainfall, includingalso
as far as possible - fragments of the upper parts of the
chambers (hydrogen cyanide is lighter than air) and also of
the concrete floors, with which the gas from the spilled
Zyklon B came into contract at rather high concentrations.
Samples, about 1-2 g in weight, were taken by chipping
pieces from bricks and concrete or scrapping off,
particularly in the case of plaster and also mortar. The
materials taken were secured in plastic containers marked
with serial numbers. All these activities were recorded and
documented with photographs. Work connected with them took
the commission two days. The laboratory analysis of the
material collected was conducted - to ensure full
objectivity - by another group of Institute workers. They
started with preliminary work: samples were comminuted by
grinding them by hand in an agate mortar, their pH was
determined at 6 to 7 in nearly all samples. Next the samples
were subjected to preliminary spectrophotometric analysis in
infrared region, using a Digilab FTS-16 spectrophotometer.
It was found that the bands of cyanide groups occurred in
the region of 2000-2200 cm-1 in the spectra of a dozen
samples or so. However, the method did not prove to be
sensitive enough and was given up in quantitative
determinations. It was determined, using the
spectrographical method, that the main elements which made
up the samples were: calcium, silicon, magnesium, aluminium
and iron. Moreover, titanium was found present in many
samples. From among other metals in some samples there were
also barium, zinc, sodium, manganese and from non-metals
boron.
The undertaking of chemical analysis had to be preceded by
careful consideration. The revisionists focussed their
attention almost exclusively on Prussian blue, which is of
intense dark-blue colour and characterized by exceptional
fastness. This dye occurs, especially in the form of stains,
on the outer bricks of the walls of the former bathdelousing
house in the area of the Birkenau camp. It is hard to
imagine the chemical reactions and physicochemical processes
that could have led to the formation of Prussian blue in
that place. Brick, unlike other building materials, very
feebly absorbs hydrogen cyanide, it sometimes does not even
absorb it at all. Besides, iron occurring in it is at the
third oxidation state, whereas bivalent iron ions are
indispensable for the formation of the [Fe(Cn)6]-4 ion,
which is the precursor of Prussian blue. This ion is,
besides, sensitive to the sunlight.
J. Bailer (1) writes in the collective work "Amoklauf gegen
die Wirklichkeit" that the formation of Prussian blue in
bricks is simply improbable; however, he takes into
consideration the possibility that the walls of the
delousing room were coated with this dye as a paint. It
should be added that this blue coloration does not appear on
the walls of all the delousing rooms.
We decided therefore to determine the cyanide ions using a
method that does not induce the breakdown of the composed
ferrum cyanide complex (this is the blue under discussion)
and which fact we had tested before on an appropriate
standard sample. To isolate cyanide compounds from the
materials examined in the form of hydrogen cyanide we used
the techniques of microdiffusion in special Conway-type
chambers. The sample under examination was placed in the
internal part of the chamber and next acidified with 10%
sulfuric acid solution and allowed to remain at room
temperature (about 20oC) for 24 hrs. The separated hydrogen
cyanide underwent a quantitative absorption by the lye
solution present in the outer part of the chamber. When the
diffusion was brought to an end, a sample of lye solution
was taken and-the pyridine-pyrazolone reaction carried out
by Epstein's method (3). The intensity of the polymethene
dye obtained was measured spectrophotometrically at a
wavelength equal to 630 nm. The calibration curve was
constructed previously and standards with a known CN-
content were introduced into each series of determinations
to check the curve and the course of determination. Each
sample of materials examined was analysed three times. If
the result obtained was positive, it was verified by
repeating the analysis. Having applied this method for many
years, we have opportunities to find its high sensitivity,
specificity and precision. Under present circumstances we
established the lower limit of determinability of cyanide
ions at a level of 3-4 ,ug CN- in 1 kg of the sample.
The results of analyses are presented in Tables I-IV. They
unequivocally show that the cyanide compounds occur in all
the facilities that, according to the source data, were in
contact with them. On the other hand, they do not occur in
dwelling accomodations, which was shown by means of control
samples. The concentrations of cyanide compounds in the
samples collected from one and the same room or building
show great differences. This indicates that the conditions
that favour the formation of stable compounds as a result of
the reaction of hydrogen cyanide with the components of the
walls, occur locally. In this connection it takes quite a
large number of samples from a given facility to give us a
chance to come upon this sort of local accumulation of
cyanide compounds.
To complete this research on the cyanide compound content in
various camp facilities, we decided to carry out several
pilotage experiments. The renovation of the Institute
building, just in progress, provided us with materials for
this investigation. We divided particular constituents of
these materials (bricks, cement, mortar and plaster) into
several 3-4 gram pieces and placed them to glass chambers,
in which we generated hydrogen cyanide by reacting potassium
cyanide and sulphuric acid. We used high concentrations of
this gas (about 2%) and wetted some of the samples with
water. Fumigation took 48 hours at a temperature of about
20oC (Table V). Another series of samples were treated with
hydrogen cyanide as well, but now in the presence of carbon
dioxide. According to calculations, in the chambers in which
people had been gassed the carbon dioxide content produced
in the breathing process of the victims was rather high and
in relation to hydrogen cyanide may have been even as high
as 10:1. In our experiment we applied these two gases (CO2
and HCN) in the 5:1 ratio. Having been subjected to gassing,
the samples were aired in the open air at a temperature of
about 10-15oC. The first analysis was conducted 48 hours
after the beginning of airing.
This series of tests allows the statement that mortar
absorbs and/or binds hydrogen cyanide best and also that wet
materials show a noticeable tendency to accumulate hydrogen
cyanide whereas brick, especially old brick, poorly absorbs
and/or binds this compound.
TABLE I. CONCENTRATION OF CYANIDE IONS IN CONTROL SAMPLES
TAKEN FROM DWELLING ACCOMODATIONS, WHICH WERE
PROBABLY FUMIGATED WITH ZYKLON B ONLY ONCE (IN CONNECTION
WITH TYPHOID EPIDEMIC IN 1942)
Site Block No Sample No Concentration of
CN- in ug/kg
------------------------------------------------------------
Auschwitz 3 9 0
10 0
------------------------------------------------------------
8 11 0
12 0
------------------------------------------------------------
Birkenau 3 60 0
61 0
62 0
63 0
------------------------------------------------------------
Note: In screening tests of 1990 two control samples also
produced 0 results.
TABLE II. CONCENTRATION OF CYANIDE IONS IN SAMPLES TAKEN IN
THE CELLARS IN WHICH THE FIRST GASSINGS OF CAMP
PRISONERS TOOK PLACE ON NOVEMBER 3rd, 1941
Site Place Sample No Concentration of
CN- in ug/kg
------------------------------------------------------------
Auschwitz cellars of Block 11
13 28, 24, 24
14 20, 16, 16
15 0
------------------------------------------------------------
Note: The CN- content in a sample of diatomaceous earth - a
component of Zyklon B (material from the Museum, sample No
24) - was 1360 ug/kg, 1320 ug/kg and 1400 ug/kg.
TABLE III. CONCENTRATIONS OF CYANIDE IONS IN SAMPLES TAKEN
FROM THE CREMATORIUM CHAMBERS (OR THEIR RUINS)
IN WHICH THE VICTIMS WERE GASSED.
A - Sample No;
B - Concentration of CN~ (ug/kg).
Crematorium I
------------------------------------------------------------
A 17 17 18 19 20 21 22
------------------------------------------------------------
B 28 76 0 0 288 0 80
28 80 0 0 292 0 80
26 80 0 0 288 0 80
------------------------------------------------------------
Crematorium II
------------------------------------------------------------
A 25 26 27 28 29 30 31
------------------------------------------------------------
B 640 28 0 8 20 168 296
592 28 0 8 16 156 288
620 28 0 8 16 168 292
------------------------------------------------------------
Crematorium III
------------------------------------------------------------
A 32 33 34 35 36 37 38
------------------------------------------------------------
B 68 12 12 16 12 16 56
68 8 12 12 8 16 52
68 8 8 16 8 16 56
------------------------------------------------------------
Crematorium IV
------------------------------------------------------------
A 39 40 41 42 43 - -
------------------------------------------------------------
B 40 36 500 trace 16
44 32 496 0 12
44 36 496 0 12
------------------------------------------------------------
Crematorium V
------------------------------------------------------------
A 46 47 48 49 50 51 52
------------------------------------------------------------
B 244 36 92 12 116 56 0
248 28 96 12 120 60 0
232 32 96 12 116 60 0
------------------------------------------------------------
------------------------------------------------------------
Notes:
Crematorium I at Auschwitz - building preserved but
reconstructed several times
Crematorium II-V[*] at Birkenau - ruins. ONly the ceiling of the
chamber of Crematorium[*] II is in part fairly well preserved.
* Transcription Note: My copy of this document has two
corrections made, in ballpoint pen, concerning the crematorium
numbers. The first instance could have read "II-IV" in the
original, and the second could have read "III" on the
original, but the ink obscures the original text. knm.
TABLE IV. CONCENTRATIONS OF CYANIDE IONS IN SAMPLES COLLECTED
IN THE FACILITIES FOR THE FUMIGATION OF PRISONERS'
CLOTHES
------------------------------------------------------------
Site Place Sample No Concentration of
CN~ in ug/kg
------------------------------------------------------------
Auschwitz Block No.1 (1)
1 4,4,4
2 0
3, iron hook 0
4, piece of 0
wood from a door
Block No.3 (2)
5 0
6 900,840,880
7 0
8 16,12,16
Two series of
determinations I. 70,30,74,142,422
were made in II. 118,52,80,60,214
block No 3 in 1990
------------------------------------------------------------
Birkenau Bath-house
Camp B1-A
53 (3) 24, 20, 24
53a (3) 224, 248, 228
54 (3) 36, 28, 32
55 (3) 736, 740 ,640
56 (4) 4, 0, 0
57 (5) 840, 792, 840
58 (5) 348, 324, 348
59 (6) 28, 28, 28
------------------------------------------------------------
Notes:
(1) Dwelling quarters next to cobbler workshop and
disinfection chambers.
(2) Disinfection facilities
(3) Materials taken from the outer side of the building
wall
(4) Mortar taken from the outer side of the building wall
(5) Plaster taken from dark-blue stains on the inner side
of the building wall
(6) Plaster from white walls inside the building
TABLE V. CONCENTRATIONS OF HYDROGEN CYANIDE AND/OR ITS
COMBINATIONS IN MATERIALS SAMPLED 48 HOURS AFTER
FUMIGATION
---------+-------------+--------------+--------------+-------------
|Fresh plaster| Old mortar | New brick | Old brick
---------+----+--------+-----+--------+-----+--------+-----+-------
Sort of |dry | wetted | dry | wetted | dry | wetted | dry | wetted
material | | | | | | | |
---------+----+--------+-----+--------+-----+--------+-----+-------
Concentration | | | | | | |
of CN~ in | | | | | | |
ug/kg | 24 | 480 | 176 | 2700 | 4 | 52 | 20 | 0
---------+----+--------+-----+--------+-----+--------+-----+-------
After a lapse of one month the concentration of hydrogen
cyanide and its combinations in the materials examined
decreased on the average by 56% (from 28% to 86%). An
apparent rise in the concentration occurred only in single
samples. That is so because the samples used for examination
were not always the same. When they had been used up in the
first run, they had to be replaced by new samples taken from
the same bigger lumps of material. This supports the thesis
on the local binding of hydrogen cyanide.
The results obtained in the next series of tests, in which
the materials were subjected to gassing with a mixture of
HCN + CO2 are presented in Table VI.
TABLE VI. CONCENTRATIONS OF HYDROGEN CYANIDE AND ITS
COMBINATIONS IN MATERIALS SAMPLED AFTER FUMIGATION
WITH HCN+C02
---------+---------+---------+---------+---------+---------+
|Fresh |Old |Fresh |New |Old
|plaster |mortar |mortar |brick |brick
---------+----+----+----+----+----+----+----+----+----+----+
Sort of |dry |wet | dry| wet| dry| wet| dry| wet| dry| wet
material | |ted | | ted| | ted| | ted| | ted
---------+----+----+----+----+----+----+----+----+----+----+
Concentration | | | | | | | | |
of CN~ in | |1000| | | | | | |
ug/kg |5920|12800 | 244| 492| 388| 52 | 36 | 24 | 60
---------+----+----+----+----+----+----+----+----+----+----+
In this case the CN~ content in mortar (old and fresh) and
in new brick was for the most part lower in the wetted
materials than in the dry ones. It seems that here a
tendency is revealed towards the competitive action of
carbon dioxide, which dissolves in water. In this series of
tests fresh plaster showed an exceptionally high affinity to
hydrogen cyanide.
After an interval of a month the mean decrease of hydrogen
cyanide content in this material was 73% and so it was
markedly greater than in the run with hydrogen cyanide only.
In as many as four samples that loss ranged from 97% to 100%
and then airing was nearly complete. This statement is
significant in as much as in their reasoning the
revisionists did not take into consideration certain
circumstances, namely, the simultaneous action of cyanides
and carbon dioxide on the chamber walls. In the air exhaled
by man carbon dioxide constitutes 3.5% by volume. Breathing
for 1 minute, he takes in and next exhales 15-20 dm3 of air,
comprising on the average 950 cm3 CO2; consequently, 1000
people breathe out about 950 dm3 of carbon dioxide. And so
it can be estimated that, if the victims stayed in the
chamber for 5 minutes before they died, they exhaled 4.75 m3
of carbon dioxide during that period. This is at least about
1% of the capacity, e. g. of the gas chamber of Crematorium
II at Birkenau, the capacity of which was about 500 m3,
whereas the concentration of hydrogen cyanide virtually did
not exceed 0.1% by volume (death occurs soon at as low HCN
concentrations as 0.03% by volume). Therefore, the
conditions for the preservation of HCN in the gas chambers
were not better than in the delousing chambers, despite what
the revisionists claim. Besides, as has already been
mentioned, the chamber ruins have been thoroughly washed by
rainfall.
The following experiment illustrated to what extent water
elutes cyanide ions. Two 0.5-gram plaster samples,
previously subjected to a fumigation with hydrogen cyanide
(after the determination of cyanide combinations in them)
were placed on filter paper in glass funnels and either of
them was flushed with 1 l of clean, deionized distilled
water. The results of the test are presented in Table VII.
TABLE VII. RESULTS OF EXAMINATION CONCERNING THE EFFECT OF
WATER UPON THE CONCENTRATION OF CYANIDE IONS IN PLASTER
----------------------------------------------------------------
Sample Initial concentration Concentration after
flushing with water
(CN~ in ug/kg) (CN~ in ug/kg) Loss, in %
----------------------------------------------------------------
I 160 28 82.5
II 1200 112 90.7
----------------------------------------------------------------
Consequently, water elutes cyanide compounds in considerable
measure. The fact that they have survived so long in the
chamber ruins is probably due to the possible formation of
cyanide combinations in the walls of those chambers at the
time of their utilization from about mid-1943 to the last
weeks of 1944 (except for Crematorium IV, which was blown up
earlier). The significance of rainfall in the process of
elution of these combinations out of the ruin walls is
exemplified by Crematorium II in the Birkenau camp, where we
have found the highest (mean) eoncentrations of cyanide
compounds, because many fragments of the gas chamber were to
a great degree protected from precipitation.
Final Remarks
The present study shows that in spite of the passage of a
considerable period of time (over 45 years) in the walls of
the facilities which once were in contact with hydrogen
cyanide the vestigial amounts of the combinations of this
constituent of Zyklon B have been preserved. This is also
true of the ruins of the former gas chambers. The cyanide
compounds occur in the building materials only locally, in
the places where the conditions arose for their formation
and persistence for such a long time.
In his reasoning Leuchter (2) claims that the vestigial
amounts of cyanide combinations detected by him in the
materials from the chamber ruins are residues left after
fumigations carried out in the Camp "once, long ago"(Item
14.004 of the Report). This is refuted by the negative
results of the examination of the control samples from
living quarters, which are said to have been subjected to a
single gassing, and the fact that in the period of
fumigation of the Camp in connection with a typhoid epidemic
in mid-1942 there were still no crematoria in the Birkenau
Camp. The first crematorium (Crematorium II) was put to use
as late as 15 March 1943 and the others several months
later.
Footnotes:
1. The terms "historical revisionism" and "revisionists" in
the sense used there have been introduced into the
literature of the field under discussion.
References
1. Amoklauf gegen die Wirklichkeit. Praca zbiorowa (B. Gallanda,
J. Bailer, F. Freund, T. Geisler, W. Lasek, N. Neugebauer,
G. Spenn, W. Wegner). Bundesministerium fuer Unterricht und
Kultur Wien 1991.
2. Der erste Leuchter Report, Toronto 1988, Samisdat
Publishers Ltd., Toronto 1988.
3. Epstein J., Estimation of Microquantities of
Cyanide, Analytical Chemistry 1947, Vol. 19, p. 272.
4. Gauss E., Vorlesungen ueber Zeitgeschichte, Grabert
Vlg. Tuebingen 1993.
5. Pressac J. C., Auschwitz: Technique and Operation
of the Gas Chambers, B. Klarsfield Foundation, New York
1989.
6. Sehn J., Ob6z Koncentracyjny Oswiecim-Brzezinka.
Wydawnictwo Prawnicze, Warszawa 1960.
7. Wspomnienia Rudolf . Hoessa, komendanta obozu
oswiecimskiego. G16wna Komisja Badania Zbrodni Hitlerowskich
w Polsce. Wydawnistwo Prawnicze, Warszawa 1956.
The study was performed and funded by the Committee for
Scientific Research under the scheme of Research Project
No 2 P 30 3088 04. Leader of the Project Prof. Jan Markiewicz.