LABORATORY supply - American Chemical Society

516-273-0900. TWX:510-227-6230. EASTERN CHEMICAL. BOX 2500 *. Division of GUARDIAN CHEMICAL CORP. HAUPPAUGE, N. Y. 11787. Rates Available...
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Here is a one-volume extensive treatment of a n e w scientific d i s c i p l i n e - e n v i r o n m e n t a l geoc h e m i s t r y — w h i c h traces the source, transition, concentration, and eventual fate of trace elements in the environment.

Trace Elements in the Environment

In low concentrations these substances will foster life, while in large doses they are often toxic. This up-to-date volume addresses itself t o this problem and surveys the latest methods of identification, separation, and measurement. Nine papers discuss: •

boron, zinc, and selenium; inorganic aerosols



vanadium, mercury, and lead



atmospheric pollutants; marine aerosol salt and dust

1 4 9 pages ( 1 9 7 3 ) Cloth, $ 1 1 . 5 0 ; Paper, $ 6 . 4 5 . Postpaid in U.S. and Canada, plus 4 0 cents else 1 where.

ADVANCES IN CHEMISTRY SERIES No. 123

Order from: Special Issues Sales American Chemical Society 1155 Sixteenth St., N.W. Washington, D.C. 2 0 0 3 6

Evaldo L. Kothny, Editor A symposium sponsored by the Division of Water, Air, and Waste Chemistry of the American Chemical Society.

L A B O R A T O R Y SUPPLY CENTER ^ W W M M ^ M M M W W M ^ M A M A A A A A A M M ^ M W W W W M A M A A f M A A M M A M A

AdipoyI Chloride • A l l y l Thiourea • Aluminon • Benzenearsonic Acid Benzhydryl Bromide* a-Bromonaphrhalene«Bromothymol Blue,Sodium 2,3-Bulanedione M o n o x i m e • Cuprous Bromide • 1,2-Diethoxyethane Diethyl Adipate • 2,7-Dihydroxynaphthalene • Dimethyl Chloroacetal Dulcitol • Esculin • Formamidine Disulfide DiHCI • Inulin o-lodobenzoic Acid • 2-Methylcyclohexanone • Methyl 2-Furoate Neutral Red • Orcinol • Phloroglucinol • Potassium-meta-Periodate Sodium Diethyldithiocarbamate • Taurine • 2,2,2-Trichloroethanol

Rates Available on Request

ANALYTICAL CHEMISTRY Donna C. Bifano Production Assistant

Write (or list K-72 of other chemicals TWX:

Tel.: 516-273-0900

EASTERN CHEMICAL Division of G U A R D I A N CHEMICAL CORP.

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510-227-6230

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H A U P P A U G E , N . Y. 1 1 7 8 7

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POLAROGRAPHIC ELECTROMETRIC REAGENTS

Bi:HiB:t:lilA/^tia/«^gj

Quaternary ammonium compounds.

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OPTICAL SHIFT REAGENT Eu (TFC) 3 1 g $30.00

Highly purified salts and solutions.

SOUTHWESTERN ANALYTICAL rurm/^Air

BOX

*ss — AUSTIN, TIX

V . n b f V l l W . A L b ARIA 512 444-3626 32nd & Griffin Ave . Richmond. CA 94804

1156 A . ANALYTICAL CHEMISTRY, VOL. 45, NO. 13, NOVEMBER 1973

—literature on request