Ratio TLC Quantitation of TLC is much more accurate with an SD-3000
Our "Nickel 200" tubing gives you the inertness of glass columns and the ruggedness of metal columns. Using A n a l a b s * Nickel 200 tubing in your gas chromatographic analyses gives you all the advantages of glass c o l u m n s . . .without the disadvantages. Whether you use packed or capil lary columns, consider Nickel 200 columns by Analabs for analysis of steroids, alkaloids, narcotic analge sics, amphetamine compounds, barbituates, catecholamines, and other thermally sensitive compounds. Write or call today for "Nickel 2 0 0 " Tubing Brochure and prices.
Analabs A unit of Foxboro Analytical Division 80 Republic Drive, North Haven, CT 06473 (203) 288-8463
This double-beam spectrodensitometer/ fluorometer rapidly and accurately analyzes thin layer media in all classical modes. Its background discriminating capability has made it the standard of R&D and quality control.
^P^ 24 Booker Street, Westwood, New Jersey 07675 (201)664-7263
SCHOEFFEL INSTRUMENT C O R P O R A T I O N
CIRCLE 195 ON READER SERVICE CARD
Thermolyne's Type 1900 and Type 2600 are available with remote temperature controls. No more reaching under the fume hood to set hot plate temperature. The controls last longer and perform better because they are not exposed to toxic fumes which can cause corrosion. Embedded heating elements provide protection from fume hood contaminants. Contact your Lab Supply Dealer or write to:
SYBROΝΙ Thermolyne ThermolyneCorp., a subsidiary ot Sybron Corp.. 2555 Kerper Blvd., Dubuque. IA 52001
Hot Plate controls work better and last longer
OUTSIDE the fume hood
FOXBORO CIRCLE 5 ON READER SERVICE CARD 558 A · ANALYTICAL CHEMISTRY, VOL. 50, NO. 6, MAY 1978
CIRCLE 201 ON READER SERVICE CARD
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