New Products multichannel pulse height analyzer. Different operating parameters can be programmed for each sample position in the 10-sample tray, and a leadedglass viewing port allows observation of samples during analysis. Nucleus 414
PCBs SRM 1589 is a freeze-dried preparation of polychlorinated biphenyls in human serum at a certified Aroclor 1260 concentration of 106 ng/g. The certificate of analysis also lists noncertified concentrations of 1,2,3,4-TCDD and 2,3,7,8-TCDD based on gravimetric additions to the material before freezedrying. NBS 421
Spectrophotometer Spectronic 1201 has a wavelength range of 190-950 nm with a 2-nm spectral bandwidth and can scan at speeds up to 2000 nm/min. Microprocessor-controlled test modes and operations include end point, kinetics, absorbance ratio and difference, multiple wavelength, statistics, linear and nonlinear curve, three-point net absorbance, and baseline storage. Computer and recorder-ready models are available. Milton Roy 415
Wet chemistry APS-915 computer-processing system works in tandem with other computers and various CFA and FIA systems and can process more than 240 samples per hour per channel. System software is available for CCP/M and MS-DOS operating systems, and data can be processed either in graphic or tabular form for printout on a dot matrix printer. Built-in quality control instrumentation troubleshoots test samples for false or questionable readings. Perco 416
ICP JY-38 Plus sequential ICP features a large, blazed holographic diffraction grating for high throughput and resolution. The standard package includes a line voltage regulator, peristaltic pump,
Lambda Reader is a microprocessor-controlled, fixed-wavelength spectrophotometer that automatically measures absorbance of samples in 96-well microplates or microwell strips. It is suitable for a variety of colorimetric assays, including ELISA, protein determination, cytotoxicity, cytoproliferation, and hemagglutination. Perkin-Elmer 403
internal reference channel, argon humidifier, nebulization system modules, and an IBM XT computer with color graphics. Instruments SA 417
Permeation device SRM 1912 consists of a 10-cm permeation tube filled with liquid tetrachloroethylene. It is intended for use both in standardization of apparatus and procedures and for preparation of gas mixtures of known concentration. Although each SRM is individually certified at 25 °C, permeation rates between 20 and 30 °C can be calculated from data provided and from an algorithm for adjusting the permeation rate relative to temperature. NBS 422
Software Chemicals Fourier transform Serum standard CHEM-cal contains assayed concentrations of albumin, BUN, calcium, creatinine, glucose, inorganic phosphorus, and total protein in a bovine serum matrix containing both protein and nonprotein constituents and bacteriostatic agents. Each kit contains six 10-mL vials that are stable for up to 10 days after opening when stored at 2-8 °C. Baker Instruments 420
Fourier Perspective II performs fast Fourier transform, digital filtering, and frequency analysis using IBM or IBMcompatible PCs. Menu-driven operations include convolution, deconvolution, apodizing windows, power spectrum, cross spectrum, autocorrelation, cross correlation, and median window filter. Two- and three-dimensional graphics allow immediate visualization of results. Alligator Transforms 425
Scientific math SciMath, a command-driven scientific math program for the IBM PC, XT, AT and compatibles, can perform sophisticated numerical calculations with no programming. Graphics features include standard X-Y plotting as well as full three-dimensional perspective plotting of surfaces. A built-in programming language for creating new applications is also included. Spindrift Software 426
Experimental optimization
GPC III gel permeation chromatography system features isocratic or gradient operation, programmable UV detection, sensitive and stable Rl detection, and optional automated sample processing and computerized data management. Waters 404 910 A · ANALYTICAL CHEMISTRY, VOL. 58, NO. 8, JULY 1986
Simplex-V, an interactive, menu-driven program for the IBM PC, XT, and AT series, allows simultaneous adjustment of up to 12 continuous variables using a modified sequential simplex algorithm. Typical applications include increasing the yield of a synthetic reaction, improving the efficiency of an extraction process, and reducing the cost of an existing process or reaction. Statistical Programs 427
