NEW
PRODUCTS
tures pull-down menus and color gra phics. Users can specify periodic mea surement of check standards and toler ance limits for calibration drift. Applied Research Laboratories/Fisons Instruments 416
Manufacturers' Literature Newsletter. Leeman Letter, No. 13, discusses the determination of phos phorus in copper, analysis of soybean oil, and ICP operating costs. Leeman Labs 434 Newsletter. Bio-Radiations, No. 72, provides information on LC systems for separation of biological mixtures, purification of plasmid DNA, and soft ware for kinetic and endpoint analysis of ELISA data. Bio-Rad Laboratories 422 Elemental analysis. Brochure high lights the Model 1108 elemental ana lyzer, which can simultaneously deter mine C, H, N, and S in < 12 min and can test samples ranging in size from
0.1 to 100 mg. Carlo Erba Instruments/ Fisons Instruments 423
Catalogs
pH. Brochure discusses the pHI series of pH meters, electrodes, and accesso ries. A table provides electrode recom mendations based on sample require ments. 16 pp. Beckman 418
Laboratory equipment. Catalog fea tures more than 2000 products for par ticle size analysis, sampling, and mate rials testing. Included is equipment for sonic sieving and microcalorimetry. Gilson 425
ICP. "Guide to Selecting an ICP" in cludes information on outlining analyt ical requirements, finding unbiased in formation on ICP spectrometers, and interpreting specification tables. 8 pp. Leeman Labs 419 Water. Brochure features the Model 304 chemical oxygen demand analyzer, designed for on-line and laboratory measurement of water quality. Appli cations and principles of operation are discussed. 6 pp. Ionics 420 LC. Rainin Dynamax Review, Vol. 3, No. 1, includes articles on single-step removal of protecting groups and puri fication of synthetic oligonucleotides and on wide-pore reversed-phase col umns for biopolymer LC. Rainin In strument Co. 421
Temperature measurement. Catalog lists temperature measurement equip ment, including thermocouples, probes, bare and insulated wire, hand held and IR temperature indicators, and temperature/voltage recorders. 120 pp. Omega 426 Scientific products. Catalog features high-purity fused-quartz labware, in cluding flasks, beakers, dishes, cruci bles, tubes, stoppers, seals, frits, bell jars, and slides. Quartz Scientific 427 Molecular biology. Catalog features products for DNA sequencing, muta genesis, electroporation and electrotransformation, nucleic acid blotting, and electrophoresis. 30 pp. Bio-Rad Laboratories 429
METERING VALVES for accurate, repeatable flow adjustment • Brass, 316 stainless steel, or • Precise control of liquids alloy 400 and gases • Choice of end connections — • Compact, low dead space gageable SWAGELOK® Tube designs Fittings, CAJON® VCR® metal • Ensured valve stability gasket face seal fittings, NPT • Vacuum to 5000 PSI; • 100% factory tested temperatures to 400°F • Sizes 1/16" to 3/8" — orifices fi» .020" to .125" Immediately available from your 5>·*Α
