YELLOW RAIN-ANALYSIS EVALUATION OF SWABS

• Document Type: FOIA
• Collection: FOIA Collection
• Document Number (FOIA) /ESDN (CREST): 00037489
• Release Decision: RIFPUB
• Original Classification: U
• Document Page Count: 2
• Document Creation Date: December 28, 2022
• Document Release Date: September 26, 2017
• Case Number: F-2012-01432
• Publication Date: August 15, 1984

Approved for Release: 2015/01/05 000037489
Analytical Branch
Research Division
Analysis/Evaluation of Swabs
A shipment des gnated 10027XXX, also identified with TI-1830513-35DL,
was received ti), the Analytical Branch from FSTC 3 June 1983. The sample
consisted of 12 swabs with dark particulates and/or oily residue on the
cotton ti .s (ft. 1)
A vapor sample withdrawn from within the plastic bag was subjected
to analysis by gas chromatography/mass spectrometry (GC/MS). Three
swabs were leached in chloroform, three others were leached ir 1:1 methanol:water.
The solvent soluble materials were analyzed by GC/MS, ion chromatography
(IC), thin layer chromatography (TLC), and infrared spectrometry OR).
The GC/MS spectra of the vapor associated with the swabs identified
the presence of trichloroethene, methylisoketone, toluene, xylene, ethyl
benzene, isopropyl benzene, isopropylcyanate, 6-methyl-hept-5-ene-2-one
and 2-methylcyclohexanol. GC/MS of the solvent soluble materials did
not give any definitive spectra.
IC detected a possible trace of cyanide. No detectable components
were separated by TLC. Derivatization with negative ion chemical ionization
MS detection for trichothecenes was negative. IR spectra identified thr
presence of water, aliphatic hydrocarbons, a carbonyl band at 1725 cm ,
and C-0 ester.
Conclusion:
No evidence of any known CW agent, agent degradation product or
trichothecene was detected. The swabs appear to have been contaminated
with a solvent mixture, typical of a cleaning or degreasing solvent.
Classified by CIA
eclassify: OADR
Approved for Release: 2015/01/05 000037489
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Approved for Release: 2015/01/05 000037489