Series 550, Standard Thermal Conductivity Gas Chromatograph, opt ion of 4 detec tors . Send for SB-550

Series 150, Fundamental Thermal Conduct iv i ty GC. Ideal for i n ­struction. Send for SB-150

Model 80-500, Liquid Chromatograph, Complete for $1450. Send for 80-500

Series 750, FID Gas Chromato­graph, Sensitivity 1 χ 10-'2 g/sec hydrocarbon. Send for SB-697

Gas Master, quantitative analysis of binary streams, many analyzers available. Send for SB-GA

Gas Leak Detector, recommended for checking chromatography sys­tems. Send for SB-21

Filaments, widest selection, pairs, quads, various materials. Send for SB-13

Detectors, macro and micro cells, diffusion type for process, semi-diffusion and flow-through for GC, fit units of most manu­facturers. Send for SB-10

Repair Service Thermal Conductivity De­tectors cleaned, repaired and re-filamented, to the specifications of the orig­inal manufacturer, with "GOOD-AS-NEW" guar­antee. Send for "REPAIR", P/L

GOW MAC 100 Kings Road, Madison, N.J. 07940 Shannon Free Airport. Co. Clare. Ireland

Telephone: 201/377-3450 Telex: 136331 Telephone: 61632 Telex: 6254 See us at Booth Nos. 1309-1311 Pittsburgh Conference

CIRCLE 93 ON READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 48, NO. 2, FEBRUARY 1976 · 107 A