IDENTIFICATION OF PRESERVATIVES 81 for the different solvent systems indicate that most of the preservatives could be identified by a combination of R l value and characteristic reaction to the indicator. Vancide •9RE, Bronopol, and MDM hydantoin required a spray reagent for identification all others could be located by UV and/or iodine vaDor. Those nroservat v• woro •qdded To a shampoo to de•erm ne {f the method ,•-a •nll,-ab•e *• •1•:• f"r)• of eo,metlo n,-oduot. The results nsin• the CHC1-x•oOTl •ol"ent •,,•tem are qhqwn in Table lIl. Several p•eqervatives were added to other cosmetic products and examined by the CHCla-MeOH system. Results are shown in Table IV. Several cosmetics containing known preservatives were analyzed by the method described. The results shown in Table V indicate that the preserva- fives claimed were indeed found. In deodorant bars, Rl values for hexachlor- ophene (HCP) did not correspond to the standard HCP but were slightly higher. On one sample, the surfactant was removed by means of ion ex- chan,•e* and gave better results. The sensitivity of this tlc method was examined for several preservatives. Various amounts of each preservative were spotted and developed by the benzene-acetone solvent system. Results are shown in Table VI the lowest detectable amount is indicated for UV light, iodine vapor, and 4-aminoanti- pyrine-potassium ferricyanide spray reagent. (Received July 16, 1974) REFERENCES (1) P. Derry, M. Holden, and S. H. Newburger. The determination of bacteriostats in cosmetics: p-hydroxybenzoates, dichlorol•hene, and hexachlorophene, Proc. Sci. Sect. Toilet Goods Ass., No. 36, 25-28 (Dec. 1961). (2) J. W. Copius-Peereboom and H. W. Beekes. Thin-layer chromatography of preserv- ing agents, J. Chromatogr., 14, 417-23 (1964). (3) L. S. Bark and R. J. T. Graham, Studies in the relationship between molecular struc- ture and chromatographic behavior. VII. The behavior of halogenareal phenols and some halogeno-alkyl-substituted phenols on alumina-impregnated papers, and on thin layers of alumina, Ibid., 24, 347-56 (1966). (4) F. W. Baker, and G. E. Booth, Halogen salicvlani]ides: photochemical and analyti- cal techniques, Proc. Joint Con[. Cosmet. Sci., Washington, D.C., 54-74 (1968). (5) H. Koenig, Separation and identification of bacterioc des based on halo•ena•ed aro- matic comr)ounds by thin-layer chromatogra•)hv, Z. Anl. Chem., 246, 747-51 (1969). (6) M. B. Graber, I. I. Domsky, and M. E. G•nn, A tlc method for identification of germicides in personal care products, J. Amer. Oil Chem. Soc., 46. 529-31 (1969). (7) •S. W. Gunner, The quantitative determination of methylenedioxy compuonds by thin-layer chromatography-direct densitometrv, ]. Chromato•r.. 40, 85-t1969•. (8) E. Stahl, Thin-Lager Chromatography, 2nd Ed., Springer-Verlag, New York, N.Y., 1969, pp. 8•6, 8•8, 886. *Amberlite CK-400 Type 1, Strong Basic Anton Resin, Fisher Scientific Co., Pitts- burgh, Pa. 15219.

JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Society of Cosmetic Chemists 1975 Officers Installed At the December 3rd luncheon session of the Society's Annual Scientific Meeting at the Americana Hotel in New York City, 1974 President Dr. Hyman Henkin installed the Officers and Dh'ectors for 1975. ' '- •' •":: .... , .:. ::• :5-'"•'•?•. .:'.• ' ' . :':•::• -: " •.' ':" : ".-' .......... '-•':' • :-:• --::- .':•:'"::" '• '.]::' •:'. .... ... .•.....•:. ß ..• ..... .:•...:: • ...... .. .• ?•.: ..... ..... •'•::•,...• ....... ...... .... :• ... •--:• .-. :-• •. •'.'. :• '•?•: :. • .%..a•.. .'•:•-• '•' - •'•-•••••••.•: ..... •. ...... '• a ': ':•':: : '-' "' '•* 7¾?.:..'-'-• "*'•&' '*' " : •" ..'.[.. "':'•':':} .... " • - '• ...:. . -:"•-, ' .'... :.::'.:'"".'.• .... '... "h' :' ß ".' ' ' ß .: ' • . ' ½0 •: .... .... .. ...... ..j...•..• .: •g.•. ,i• •..• •(• • ..'...... .... . •. .. •:. .• • ß ..:.'. .•..,... ' .•::• - • C.'"'?:-:-::::: . '• •?: •'-:'.. '2•'•4 :• ..... ."• •::. -:• •:-.:• '. •: • • :.,•.. • ':'.'. : '•." - '.. : '•-':*-•al ' a. '. '• -}:'•. • '• '}'• ': ' •5•: '•a • t •'•:•'•s''•':.-•'•:• kp,•: y: •.:•-':'::..:• .... ' .... •':- • '•: • ::":• •'• •. *' .f• • ': '• .7 .•'?-:": V-• •-" .'• ' • %:• I:.'::..'1 ]•'• :. :... "• :. :•:.:. ' •,.e t:j• '•:':: "? 'E • :'.:.•, ] '-. d: :..•.: ?." .• •:" • :• .:" '::• •'• e.:.. ...... •. •-:. •: • ................ .. • -. • • ...... • 'a-::: .• : /•:.Tdy•, ,,..::.•" :•. .•7•.:.-':•-_-•:-::•::. •....' '".•e... :•:•-:.•- .". - '- .1• '•' '• :"• • -']. •:'.k.•':*• •' -:2• ß '":: '• .•'. • - . .•.%c.. •..•." -•-. •.• .•- ... .......... • .' Leit to right (seated): Treasurer Paul Thau, Director (Area II) •etty Lou Day, PreM&nt Stephen G. Hoch, Secretary Gail Phillips Bucher, President-Elect Joseph H. Kratochvil (standing) Director (Area I) Graham Barker, Director (Area lid Horst A. E•h•dt, Director (Area 1) Mir&ell L. Schlossman, Board Chairman H•an Henkin,. Director (Area I) George Polla&, and Director (Area II) Stanley E. Allured