New Products
New J.T. Baker calatog lists over
150
products for gas chromatography I n c l u d e d are these special product groups: ULTREX® Standards . . . zone refined organics, organic liq uids . . . most with a purity of 99.95 + % . 'Baker Instra - A n a l y z e d ' ® Solvents . . . g u a r a n t e e d 99 + % by CC. Each bottle s u p p l i e d w i t h a c t u a l gas c h r o m a t o g r a m , a c t u a l UV curve, IR curve and chem ical analysis. Column packing materials for liquid phases include Squalane, Cholesterol Benzoate, Silicones and Silicone Gum Rubber. Solid supports and adsorbents include M o l e c u lar Sieves, Silica Gels and Aluminas. Application and product in formation on these materials for gas chromatography is provided in Catalog 700. Carrier and laboratory gases and calibration mixtures are listed in the Baker specialty gas c a t a l o g , a v a i l a b l e o n request. For the products he needs and uses most often—the profes sional chooses J. T. Baker. J. T. Baker Chemical Co. 222 Red School Lane C-7 Phillipsburg, N.J. 08865
J.T.Baker CIRCLE 22 O N READER SERVICE CARD
DATOS 305 interface is a programmable coupler that can feed data to an off-line recording device or a minicomputer. The interface can, for example, accept data from four panel meters, or two high-speed counters, or a clock and two-digital thermometers, etc. The out put data rate is determined by the out put device and can be as high as 100K words/sec. The throughput rate is 3 /tsec. The input is BCD code and can be 1248 or 1242 or Gray or any 4-bit code in either TTL or user specified logic levels. With the 305 it is possible to use equipment already in the lab to build a data logging or data acquisition system. $900. Data Graphics Corp. 512-342-9486. 428 Model 69-550 thermal conductivity gas chromatograph ($875) is recommended for use with a Harvey gas permeationmoisture vapor transmission apparatus. The combined system permits gas per meation and/or leak studies that allow for measurement of individual gases under their partial pressures. Thus, mixtures like air, C02, O», and humidi fied gases can be used as test gases. A companion instrument is the Model 70-210 1 mV strip chart recorder with 10-in. wide chart paper ($595). GowMac Instrument Co. 201-377-3450
429 SDA-322 automated scanner transports paper strips over the spectral scanning area for use with SD 2000 and 2000 Series chromatogram densitometers. The strip can be scanned in a double beam mode; a wide range of scanning speeds is available if a multispeed mo tor is used. $320. Schoeffel Instru ment Corp. 201-664-7263 430 Analog X-Y recorder features pres surized ink writing, Metrisite feedback system (no slide wires); 40 in./sec slewing speeds; 100 uV/idv to 1.0 V/idv sensitivity range; 10 in. χ 15 in. writing area; electrostatic paper hold-down; and balanced, floating, and guarded inputs. The recorder weighs only 32 lb and may be bench or rack mounted. $1395. Gould, Inc. 216-361-3315
431 Model MS 21 isotope ratio mass spec trometer is a dual collector mass spec trometer incorporating solid state cir cuit design, automated vacuum system, and automatic sample inlet switching. Typical applications range from protein, lipid, and carbohydrate metabolism studies by use of stable isotope tracer techniques to studies of ore deposits. Reproducibility of isotope abundance ratios is usually better than 0.02%. Vacumetrics. 617-899-3706 432
"Tygon -like" "Almost Tygon" " Tygon -type" "Simulates Tygon"
Hogwash! There's only one Tygon For over a quarter of a century, the name TYGON—a registered trademark of Norton Company—has symbolized unsurpassed quality. There is only one TYGON Tubing, a product of Norton. Identification of genuineTYGON Tubing is quick, easy and positive—the name "TYGON" and the formulation number appear on every foot. Always insist on genuine TYGON Tubing, available at Laboratory Supply Houses everywhere.
NORTON PLASTICS & SYNTHETICS DIV. FORMERLYU.S.STONEWAREINC. AKRON. OHIO 44309
CIRCLE 91 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 43, NO. 14, DECEMBER 1971
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