46 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS CONCLUSIONS The methodology described presents a means of rapidly estimating the N-nitroso content of cosmetic preparations. Nitrite can also be determined on the sample extract. The detection limits using a 2 gm sample are 0.002 ppm NNO-N or 0.02 /zg/gm NDELA and 0.002 /zg/NO2-N gm. Reproducibility for both nitrite and nitrosamine were less than 13% with recoveries of greater than 82%. Although the method does not distinguish specific N-nitroso compounds, it does provide a rapid screening technique. The ease of sample preparation for both nitrite and nitrosamine presents a significant decrease in the time of analysis when compared to spectrophotometric and species specific techniques. REFERENCES (1) T. Y. Fan, V. Goff, L. Song, D. H. Fine, G. P. Arsensault, and K. Biemann, N-nitrosodiethanolamine in cosmetics, lotions, and shampoos, Food Cosmet. Toxicol., 15,423-430 (1977). (2) B. Rollmann, P. Lombart, J. Rondelet, and M. Mercier, Determinatiosn of N-nitrosodiethanolamine in cosmetics by gas chromatography with electron capture detection, Jour. Chrom., 206, 158-163 (1981). (3) S.S. Hecht, J. B. Morrision, and J. A. Wenninger, N-nitroso-N-methyldodecylamine and N-nitroso-N-methyltetraddcylamine in hair-care products, Food Chem. Toxicol., 20, 165-169 (1982). (4) Ira E. Rosenberg, John Gross, and Tony Specus, Analysis of nitrosamines in cosmetic raw materials and finished product by high pressure liquid chromatography, J. Soc. Cosmet. Chem., 31, 237-252 (1980). (5) Ira E. Rosenberg,John Gross, and Tony Spears, Analysi} of N-nitroso-diethanolamine in linoleamide DEA by high pressure liquid chromatography and UV detection, J. Soc. Cosemt. Chem., 31, 323-27 (1980). (6) Julia L. Ho, Harris M. Wisneski, and Ronald L. Yates, High pressure liquid chromatographiothermal energy determination of N-Nitrosodiethanolamine in cosmetics, J. Assoc. Off. Anal. Chem., 64, 800-804 (1981). (7) Ira Rosenberg, John Cross, Tony Spears, and Ursula Caterbane, Methodology development for the determination of nitrite and nitrosamines in cosmetic raw materials and finished products. J. Soc. Cosmet. Chem., 30, 127-135 (1979). (8) Yoji Fukuda, Yoshihiro Morikawa, and Isao Matsumoto, Ion-exchange chromatographic separation of N-nitrosodiethanolamine in cosmetics, Anal. Chem., 53, 2000-2003 (1981). (9) Victor H. Baptist and Richard Brown, Nitrosamine determination by use of conventional equipment, J. Soc. Cosmet. Chem., 31,219-222 (1980). (10) Robert D. Cox, Determination of nitrate and nitrite at the parts per billion level by chemilumines- cence, Anal. Chem., 52, 332-335 (1980).