pierce chemical company - ACS Publications

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NEW CHEMICALS

Corasil/C,, liquid-chromatography pack­ ing material has a Ci8 hydrocarbon (the reverse phase) bonded to a solid-core, pellicular packing (Corosil). The ma­ terial exhibits fast mass transfer and good sample loading capability and is useful for separating corticosteroids, estrogens, barbiturates, etc. It is avail­ able in 25-ml units or in packed, pre­ testing 2-ft χ Vs-in. columns. Waters Assoc. 617-879-2000 437

Ultra-thin foils, ranging from 0.00002 to 0.0005 in., and high purity include the following: AI, Sb, Bi, Cd, Cr, Co, Cu, Au, Fe, Pb, Mg, Mn, Mo, Ni, Mb, Pd, Pt, Rh, Ag, Ta, Sn, Ti, W, V, Zn, and Zr. Reactor Experiments, Inc. 415-5923355 438

'MethElute', 0.2M trimethylanilinium hydroxide in methanol, is our new methylating agent that derivatizes instantaneously and quantitatively when injected w i t h the sample into a gas chromatograph. This on-column methylation has received considerable publicity lately due t o its use in the detection of barbiturates, 1 ' 2 , 3 sedatives, 1 ' 3 xanthine bases,2 phenolic alkaloids 2 and D i l a n t i n . 3 * With the advent of this new reagent troublesome secondary peaks are eliminated, giving a single quantitative peak response to the substance in question.

NEW

We have prepared a four page technical bulletin describing the use of 'MethElute' in determining sedatives and showing sample chromatograms. If you'd like t o have one just drop a card or note t o our Literature Department. 'MethElute' is in stock f o r immediate delivery; it is packed in 10 ml Hypo-vials; please order as follows: 49300

New and reissued Standard Reference Materials include potassium chloride clinical standard; plutonium metal standard matrix material; α-quartz for hydrofluoric acid solution calorimetry; tin on steel, coating weight SRM's; strontium carbonate, assay, and isotopic SRM; stainless steel, optical emis­ sion, and X-ray spectrometric SRM's; oxygen in nitrogen, gas standard; glass and liquid filters for spectrophotometry; and iron foil Môssbauer standard. For a complete list of SRM's available from NBS, write for NBS Spec. Publ. 260, for sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402, for $.75. Order by SD Catalog No. C13.10:260.

INSTANTANEOUS ON-COLUMN METHYLATING AGENT.

' M E T H E L U T E ' , 10ml

$12.50/each; 12 vials, $9.60/each

J. Chemical and Engineering News, page 13, April 12, 1971. 2. Brochmann-Hansen and Oke, J. Pharm. Set.. 58, 370-371 (1969). 3. M. James Barrett, The Clinical Chemistry Newsletter, 3, No. 1, Spring 1971, published bv Perkin-Elmer Corporation, Norwalk, Conn. " Dilantin is a trademark of Parke-Davis and Co. 'MethElute' is a trademark of Pierce Chemical Co.

PIERCE CHEMICAL COMPANY P.O. Box 117 Rockford, Illinois 61105 U.S.A.

PHONE 815/966-0747

TWX 910-631-3419,

CIRCLE 1 6 0 O N READER SERVICE CARD

The preferred column tubing NOW A V A I L A B L E FOR IMMEDIATE SHIPMENT

HANDY & HARMAN TUBE CO. Bovine liver, a new Standard Reference Material, has certification values for 11 trace metals. They are mercury, cadmium, lead, selenium, zinc, sodium, potassium, rubidium, manganese, iron, and copper. For a discussion of the botanical SRM's, see Standard Reference Materials, Nat. Bur. Stand. (U.S.), Tech. News Bull., 55, 231-33 (September 1971).

Ecolo-trol is a water standard with known values for BOD, COD, total suspended solids, conductivity, total carbon, organic carbon, and pH. The values are based on American Public Health Association methods. Alpha Assoc, 4536 Newportville Rd., Levittown, PA 19056 439

(CHROMAT

I.D.™ Now! Chromât I.D. Tubing is available in pre-packaged boxes for immediate shipment. Available on spools in lengths f r o m 100' to 1000' in sizes . 0 6 2 " O.D. χ . 0 1 0 " , . 0 2 0 " , . 0 3 0 " I.D. Other sizes up t o . 6 2 5 " O.D. also available.

A Handy and H a r m a n Company

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HANDY & HARMAN TUBE COMPANY Norristown, Pa. 19404 Telephone (215)275-2734 Outside U . S . A . : Handy & Harman Tube Co. Export Dept. 1010 Schaff Bldg. Phila. Pa. 19102. Cable-Machinex. Telex 845-388 CIRCLE 93 ON READER SERVICE CARD

A N A L Y T I C A L CHEMISTRY, VOL. 4 4 , NO. 7, J U N E 1 9 7 2

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