Attention Gas Chromatographers Derivatizing Agents The following are some of the derivatiiing agents available f r o m PCR stock. 27090 34040
13090 13100 13120 34020 34090 11023 13200 27490 NOTE:
Chlotomethyldimethylchlorosilane (CMDMCS) 5 0 g - $15.25; 2 5 0 g - $ 6 0 . 0 0 N,N-Diethylaminotrimethylsilane (Trimethyl-N.N-diethylaminosilane) 10g -$20.00; 50g- -$80.00 Heptafluorobutyric acid 5 0 g - 515.00; 250g- $62.50 Heptafluorobutyric anhydride 25g— $19.50; 100g- -$61.00 Heptafluorobutyryl chloride 2 5 g - $16.00; 100g- $60.00 Hexamethyldisilazane (HMDS) 1 0 0 g - $12.00; 500g- $25.00 1,1,3,3-Tetramethyldisilazane 25g $21.00; 100g- $65.00 Trifluoroacetic acid (High Purity Fe Free) 1 0 0 g - 10.00; 500g- $40.00 Trifluoroacetic anhydride 100g - $ 1 2 . 0 0 ; 1kg- $88.00 Trimethylchlorosilane (TMCS) 100g $10.00; 5 0 0 g - $ 2 5 . 0 0 Minimum order: $25.00
PCR, INCORPORATED PCR
Research Chemicals Division P.O. Box 1466/Gamesville, Florida 32602 (904) 376-7522 CIRCLE 174 ON READER SERVICE CARD
*S* Highly accurate igh sensitivity calibrate and use A I ^ J % · • Lame Large sarriD sample compartment • Spectral Range: 220 to 750 nm Optional "Light Quantum Counter" ^^m W allnws "Corrected" Spectra allows
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• Easy tô
JASCO Model FP-4 Fluorescent Spectrophotometer features double-beam ratio photometry and indicates fluorescent spectra at 50 nm/min scanning. Connects to any High Pressure Liquid Chromatograph. Includes two independent grating-type monochromators.
For complete details, please call or write: JASCO INCORPORATED 218 Bay Street Easton, Maryland 21601 (301)822-1220
Jasco
CIRCLE 109 ON READER SERVICE CARD 930 A · ANALYTICAL CHEMISTRY, VOL. 47, NO. 11, SEPTEMBER 1975
in this area include column packings, supports, stationary phases, chemical standards, reagents, columns, syringes, and column selection course materials in gas chromatography, including a textbook, "The Packed Column in Gas Chromatography."
Arthur H. Thomas Co. Vine St. at Third, Philadelphia, Pa. 19105. Thomas peak detection system including Model 268 peak detector, Model 68 readout 80 printer with Thomas universal tape punch. All new Thomas "Big Dipper." Equipment from selected manufacturers, Camag. Eluchrome and fraction collector. Hitachi, new 100 series spectrophotometer; 701 two wavelength photometer. Isotope Zeeman atomic absorption and Mettler balances.
Tracor lue 6500 Tr'acor 'Lane, Austin, Tex. 78721. Model 560 digital gas chromatograph, universal liquid chromatograph, Tracor analytical processor with TTY. Specific detectors for GC and LC, recorders, and air pollution monitors. Tracor Northern 2551 W. Beltline Hwy, Middletown, Wis. 53562. X-ray analysis system including NS-880 quantitative, computer-based X-ray analyzer with TN-1310 wave dispersive automation options. TN-1700-X lowcost, computer-based, semiquantitative X-ray analyzer. TN-11/1203 computerbased signal processing and data acquisition system, new TN-1500 computer-controlled digital signal analyzer, NS-570 lowcost dedicated digital signal averager. Variable Volumetrics, Inc. P.O. Box 209, Industrial Way, Wilmington, Mass. 01887. Finnpipettes, variable column, high-accuracy, and precision hand-operated pipetors, covering complete range from 0 to 5,000 μΐ. Tips, polypropyl ene disposable pipet tips, Finntips, volu metric tips, budget tips. V-V cuvettes, polystyrene disposable 1-cm light path cu vettes. Ultra filtration cells, Nature maga zine, British Journal of Anaesthesia. Varian 611 Hansen Way, Palo Alto, Calif. 94303. (No products to be listed). Waters Associates, Inc. Maple St., Milford, Mass. 01757. Complete liquid chromatography instrumentation, accessories and LC and GC column packing materials. W h a t m a n , Inc. 9 Bridewell Place, Clifton, N.J. 07014. Broad range of Pellicular and microparticulate packings and prepacked columns for HPLC. Featuring partisil family of 5-, 10-, 20-, and 40-μ silica, reverse phase, polarbonded phase and ion exchangers for both analytical and preparative liquid chroma tography. Complete line of complementing tubing, fittings, and injection mechanisms. Wilks Scientific Corp. 140 Water St., S. Norwalk, Conn. 06856. Complete line of IR accessories for all IR spectrophotometers including various long path gas cells. Miran-1 portable IR analyz er for on-the-spot liquid, solid, and gaseous sampling. Miran-101 specific vapor analyz er. Miran-II continuous monitoring IR ana lyzer for ambient air analysis and process control. W i l m a d G l a s s Co., I n c . Route 40 and Oak fid., Buena, N.J. 08310. NMR, EPR, IR sample tubes, cells, and ac cessories; recording charts, deuterated sol vents, microliter syringes; plus new innova tions in NMR glassware.
