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2992475 
Journal Article 
Determination of volatile nitrosamines in crops and soils treated with dinitroaniline herbicides 
West, SD; Day, EW 
1979 
Yes 
Journal of Agricultural and Food Chemistry
ISSN: 0021-8561
EISSN: 1520-5118 
PESTAB/79/2939 
27 
5 
1075-1080 
English 
546947 
WOS:A1979HL82200037 
PESTAB. Volatile nitrosamines have been reported to be comtaminants in several dinitroaniline herbicides. Since these nitrosamines are known to be carcinogenic in laboratory animals, it became necessary to analyze crops and soils treated with those herbicides for the presence of nitrosamine residues. In the procedures described, plant tissue was extracted with methanol, and soil was extracted with methanol: water (3:1). Sample extracts were purified by liquid-liquid extraction and alumina column chromatography. Measurement was accomplished by means of a gas chromatograph thermal energy analyzer. The sensitivity of the methods was 0.2, 0.05, and 0.01 ppb for N- nitrosodi- n- propylamine in crops, soil, and water, respectively. No detectable nitrosamine residues were observed in any crops treated with the herbicides trifluralin, benefin, or oryzalin. (Author abstract reprinted by permission of the American Chemical Society)