Tracer Gas Vapor Detector
Vinyl Chloride Detector
SF-6 gas detector/chromatograph de tects traces of sulfur hexafluoride tracer and other halogens in minute concentrations. Detection is by an electron capture detector. The unit is capable of operating from recharge able batteries for field use, and the de tection probe is made of nonsparking brass and glass fiber and has a water trap. Ion Track Instruments, Inc. 426
This simpie-to-use gas detector kit is designed to measure 5-500-ppm vinyl chloride in the atmosphere as well as the atmospheric levels of 82 hazardous gases. Precise samples are drawn into the reagent-filled tube by means of a precision-calibrated pump. Vinyl chlo ride tube # 132B has a lower detection level of 1 ppm. Matheson Gas Prod ucts 418
C 0 2 Monitor/Controller
Automatic Gradient Former
Model 20-450 monitor/controller mea sures and regulates the percent carbon dioxide content of incubators. Fea tured are direct reading of the co 2 con centration, direct dial setting of de sired concentration, all solid-state cir cuitry, decreased C 0 2 consumption, and accuracy to ±0.25% CO2 in air. Single unit price: $580; double unit price: $990. GOW-MAC Instrument Co. 433
The Mixograd forms linear, concave, convex, or complex gradients of pH, concentration, etc., by combining two liquids in continuously varying pro portions. A gradient profile is drawn on millimeter graph paper, cut to shape, and repeated with perfect re producibility with the aid of an elec tronic profile-following device. Includ ed are a built-in column rinse timer, automatic shut-off, and a peak detec tor to interrupt the gradient. Gilson Medical Electronics, Inc. 408
So much more automatic titration capability... I Modulai system I for automatic titrations
Particulate Metals in Air Air microsampler for sampling partic ulate metals in air traps airborne par ticulates on a millipore filter and ana lyzes the sample by atomic absorption spectrophotometry. Analysis time takes 3 min, including sample collec tion. Lead concentrations as low as 0.1 μg/m 3 and cadmium levels as low as 0.0008 Mg/m3 can be measured rou tinely. Varian Associates 412
Tubular Furnace Model 1700 H T F horizontal furnace features 1650°C maximum tempera ture and a new type heating element for instant servicing. The 3-in. diame ter furnace is especially suited to sin tering, ceramic firing, brazing, anneal ing, and crystal-growing applications. CM Manufacturing Co. 415
Fourier Transform IR Spectrophotometer FTS-15 F T infrared spectrophotometer provides a high-res olution interferometer, high-speed minicomputer, and fourth-generation FT/IR software. Resolution to 0.25 c m - 1 is selectable from a silent magnetic keyboard. Features in clude an alphanumeric graphic display, printout on a digital plotter, and a light pen and interactive display scope. The dolible-beam spectrophotometer with improved signal-tonoise ratio (S/N) is priced at $79,950. Digilab, Inc. 407
it takes these 8 pages to tell about it. The multi-purpose Mettler Automatic Titrator actually offers more automatic titration capability than any other comparable system. You can carry out automatic end point titration, recording titration, pH or pTon stat procedures. Its accuracy and versatility meet the exacting demands of the research laboratory. Its ease of operation makes it ideal for the quality control lab. For continuous automatic control, just start it up and press a button. Programming controls are simple. Rapidly interchangeable burettes in 1, 10, 20 and 50 ml snap-in and snap-out of the drive to speed titrant changes. The Mettler Automatic Titrator meets all potentiometric needs with aqueous and nonaqueous solutions, and provides direct entry into data processing systems. For more information, circle the number.
Mettler CIRCLE 1 6 0 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY VOL. 46, NO. 12, OCTOBER 1974 • 1075 A
