New Products Photomultiplier for Luminescence Measurements Lumacounter, Model 2 0 8 0 , is a m i c r o computer-controlled photomultiplier for luminescence measurements. Using a m i c r o c o m p u t e r , the instrument can automatically perform synchronized in j e c t i o n , multiple injection, incubation, data processing, and m e m o r y callback. It has three operational m o d e s - i n t e g r a tion, peak, and r a t e — a n d a t e m p e r a ture-controlled counting chamber (25, 30, and 37 °C). The Lumacounter has an automatic synchronized dispensing system for accuracy and reproducibility that injects a precise quantity of light emitting or any other reagent w h e n the sample is in the counting chamber. Lumac Inc. 408
Computer System The OS255 oscilloscope features 15 MHz response, 2 mV/cm sensitivity, sweep speeds to 500 ns/cm (100 ns/cm with X5 expand), dual-trace and X-Y display, AC/DC and TV trigger coupling, channel sum and difference display, and Z-mod input to facilitate use with logic ana lyzers. The OS255 uses a 8 X 10 cm rectangular CRT. Price is $795. Gould Inc., Instruments Division 404
Gas Purifier
Gas-Phase Titration Calibrator
The disposable gas purifier removes oxygen and trace amounts of organics and water f r o m inert gas carriers such as nitrogen, helium, argon, or hydrogen to less than 1 p p m . The unit treats three 3 0 0 - f t 3 gas cylinders w h e n the i n c o m ing oxygen concentration is 10 p p m or less. Price is f r o m $84. Diamond Tool and Die, Inc. 415
The CSI-1700 gas-phase titration cali brator provides single-point, multipoint, zero and span calibrations of N O / N 0 2 , S 0 2 , and 0 3 . Concentration ranges are 0 . 0 - 5 . 0 p p m for S 0 2 and NO, and 0 . 0 - 1 . 0 p p m for N 0 2 and 0 3 . The c o n centration of N O / N 0 2 and S 0 2 is varied by diluting a standardized gas mix. The O3 concentration is varied by c o n t r o l ling UV-generator lamp brightness with a patented optical feedback circuit. C o lumbia Scientific Industries Corp. 419
LC Micro Flow Cells T w o models of the liquid chromatogra phy micro flow cell for fluorescence detection are available. One is for use with the c o m p a n y ' s line of MPF instru ments, and the other is for Model 204 fluorescence spectrophotometers. The major advantage of the 20-μΙ_ rectangu lar quartz cell is reduced light scatter ing. Perkin-Elmer Corp. 412
Automatic Analyses of Ions The Autolon System 12 analyzer has a 99-sample capacity that provides high throughput of ions in c o m p l e x matrices at trace levels and above. Chief appli cations are for inorganic anions like F~, C I " , N 0 2 " , P 0 4 " 3 , Br", N 0 3 - , SO,,"2, organic acids, metal oxides, alkali m e t als, alkaline earths, a m m o n i a and amines. Dionex Corp. 422
TLC Tank A controlled atmosphere developing TLC tank has a nonslip lid w h i c h c o n tains a gas inlet and outlet at opposite ends, and 2 - m m bore Teflon stopcock for gas glow regulation. To facilitate ad dition of solvent after flushing without disturbing the inert atmosphere, a 1 / 2 -in. diameter port with plastic closure is contained in the lid. A multiplate rack is optional. Tank volume is about 5 L and measures 1 1 3 / 4 X 4 X 14 in. S c i e n tific Manufacturing Industries, Inc. 416
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1346 A · ANALYTICAL CHEMISTRY, VOL. 50, NO. 14, DECEMBER 1978
MINC, a modular lab computer, incor porates a 16-bit PDP-11 computer, t w o double-density floppy disks for data and p r o g r a m storage, and a video terminal displaying graphical and alphanumeric data. It can be used for laboratory data acquisition and instrument control, graphics, scientific computations, and for general data processing. The MINC system uses MINC Basic software, a laboratory-oriented version of the Basic programming language. Price is $ 1 2 500. Digital Equipment Corp. 423
S 0 2 Analyzer Model 8 3 0 3 sulfur dioxide analyzer has received EPA designation as an a p proved equivalent method analyzer. It uses a flame photometric detector for continuous monitoring of S 0 2 in a m b i ent air with ranges of 0 - 5 and 0 - 1 p p m . A safety feature of the analyzer is the automated hydrogen shutoff. Bendix Corp. 424
Chemicals Carrier Ampholytes Pharmalyte, a series of six carrier a m pholytes developed within the c o m p a ny's research labs, gives a pH interval with controlled properties resulting in low and even conductivity, buffering c a pacity, and a linear pH gradient. The pH intervals are 3 - 1 0 , 2 . 5 - 5 , 4 - 6 . 5 , 5 - 8 , 6 . 5 - 9 , and 8 - 1 0 . 5 . Pharmacia Fine Chemicals 429
