atetyepute, for they shall give fast accurate test results. Spectroquality" Solvents W i t h o u t exception, M C / B Spectroquality Solvents specifications are more stringent than any published or recommended specifications for solvents to be used in spectrophotometry. This includes absorbance characteristics, water and evaporation residues. O u r current catalogue lists 44 such solvents. T h a t ' s more than anyone else in the industry. And M C / B can provide Spectroquality Solvents in any quantity from a gram to a ton — all with the same rigid purity standards that have made us the leader in the industry. Pesticidequality Solvents M C / B Pesticidequality Solvents are specially purified for use in the
determination of pesticide residues by GLC utilizing electron capture and flame photometric detections. It is the finest and most extensive line of solvents available for this purpose. These solvents are certified to contain no interfering substance greater than that equivalent to: 5 n a n o g r a m s / l i t e r chlorinated pesticide (5 ppt), 50 n a n o g r a m s / l i t e r Parathion (50 ppt), 0.2 meg/liter p h o s p h o r u s (200 ppt). M C / B Pesticidequality Solvents exceed EPA Standards. All M C / B Spectroquality Solvents and Pesticidequality Solvents are competitively priced. For additional information and sample spectra, just fill in the coupon and mail it to us.
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Please send me, as quickly as possible, additional information and sample spectra for your • Spectroquality Solvents Catalog • Pesticidequality Solvents Catalog Name Company, Position _ Address City State
Mail to: Dr. Roy Schumacher M C / B Manufacturing Chemists 2909 Highland Avenue Norwood, Ohio 45212 (513) 631-0445
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MCJJB, MANUFACTURING
CHEMISTS
CIRCLE 163 ON READER SERVICE CARD
414 A · ANALYTICAL CHEMISTRY. VOL. 47, NO. 4, APRIL 1975
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