ALPKEM Corporation


ALPKEM Corporationpubs.acs.org/doi/pdfplus/10.1021/ac50038a821COMPOUND Q: a low cost, putty-like, versatile sealant. WAX...

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Manufacturers' Literature Reversed-Phase HPLC. Bulletin #124, "Reversed-Phase HPLC—Which Column?" discusses modes in reversedphase HPLC, differences in microparticle R-P bonded phases and the functionalities used, mobile phase considerations, and a guide for selecting optimum reversed-phase and column required for the separation. The bulletin has two appendices. Appendix I covers applications of reversed-phase HPLC such as pharmaceuticals, pesticides, biologicals, nucleic acid constituents, and proteins. Appendix II discusses ion pair chromatography, theory, and practice on reversed-phase columns. 40 pp. Whatman Inc. 466 Sulfur and Chlorine Analyzer. Application report no. 2 describes the PGT sulfur and chlorine analyzer, which is based on energy-dispersive X-ray fluorescence. Precision is better than ± 0 . 2 5 % for samples containing up to 5% of S and 7% of CI, by weight. 2 pp. Princeton Gamma-Tech 472

Strip Chart Recorder. Model 105 strip chart recorder, featuring a left margin event marker, automatic pen lift when chart drive is turned off, 1.0 mV to 10 V measurement range, and response time of less than 350 ms, is illustrated in bulletin 456-7. 6 pp. Gould Inc. 468 Metal Tester. General alloy ID lab #1599 metal tester identifies most of the common steels by a colog spot test for 14 alloying elements: C, Cr, Co, Cu, Fe, Mn, Mo, Nb, Pd, S, Ti, W, Ni, and V. These tests are used to characterize stainless steel series 303, 309, 316, 321, 347, and 400; Hastelloys; Inconels; tool steels; and low alloy and carbon steels. 8 pp. Koslow Scientific Co. 469 Baths. In addition to the company's standard water, oil, and refrigerated models, bulletin 784 includes data on baths for thermal shock. Temperature ranges of units run from —100 to 260 °C. 8 pp. Blue M Electric Co. 473

Flame Retardant. Data bulletin #353 describes Thermoguard CPA flame retardant, a free-flowing white powder, which can serve as a replacement material for antimony oxide. It has been used to impart flame resistance for polystyrene, polyvinyl chloride, polypropylene, and ABS formulations. 4 pp. M&T Chemicals Inc. 470 Pyrolyzing Samples for IR. An application note entitled "Pyrolyzing Samples for Infrared Analysis" describes the principles of operation by which samples of such materials as polystyrene and other plastics, epoxy resins, or various types of synthetic or natural rubbers can be prepared for an IR spectrophotometer. 6 pp. Barnes Engineering Co. 471 For more information on listed items, circle the appropriate numbers on one of our Readers' Service Cards

The cAutoAnalyzer' is the standard

prevent vacuum leaks... stop laboratory glassware breakage use A P | F 7 Q | \ | GREASES · OILS · WAXES

and cALPKEM rebuilds the standard. * Rebuilt AutoAnalyzer instruments * Full line of accessories & supplies îjc Applications Engineering

Apiezon lubricants are especially formulated for use with high vacuum laboratory equipment. These easily applied, high purity, low vapor pressure, stable products are resistant to organic solvents, most chemical vapors. GREASES—anti-seize greases which eliminate costly breakage: for high vacuum use down to 5 χ 1 0 - " torr at 15°C and moderate vacuum use to 10-' torr. They won't leach out of ground glass joints or stop cocks. OILS—ideal as vapor diffusion pump fluids. They greatly minimize the need for a cold trap, permit maximum pumping speeds, reduce operating and maintenance costs. COMPOUND Q: a low cost, putty-like, versatile sealant. WAXES—for sealing vacuum joints more permanently.

ALPKEM Corporation 14625 S.E. 8 2 n d St., Clackamas, OR 9 7 0 1 5

503-657-3010 or 800-547-6275 • T r a d e m a r k Technlcon C o r p . CIRCLE 5 O N READER SERVICE CARD

Write or call for your free copy of Bulletin 43a

JAMES G. BIDDLE CO. P l y m o u t h M e e t i n g , P e n n s y l v a n i a 19462 P h o n e : (215) 6 4 6 - 9 2 0 0 413 CIRCLE 30 O N READER SERVICE CARD ANALYTICAL CHEMISTRY, VOL. 5 1 , NO. 2, FEBRUARY

1979 ·

255 A