Chromatogram Analysis? Consider this. Consider the Schoeff el SD 3000. Why? Fair question. Answers: It's a Multi-Media System: You can quantitate TLC plates, disc and ί il gels, columns, agars, lilms, acrylamides, paper strips. Among others. More Versatile: Transmission (spectral absorption) or reflection (flu orescence, fluorescence quenching} modes. High intensity source, transmission and emission analyzing monochromators permit spectrophotometric detection, spectrofluorometry, emission anal ysis, etc., etc. It's More Accurate, More Sensitive: The SD 3000 will detect and quan titate sub-nanogram amounts; linear function ranges for quanti tation 0.3 rtg upward. It is a double- (or single-) beam backgrounddtscriminating System; mhomogenieties, anomalies are ratioed out Superior resolution· it will resolve substance zones uf (jie.il c> ι ρ ixity, e.g., in mixtures with superimposed absorbances and fli . nces or quench and fluorescence intcr-mixtures. Usable, High Confidence Readouts: Selection of Linear {0 to 100%T) or Log (0 to 3 O.D.) output modes. Linearity, log mode, ±0.5%; tin mode. ±1.0%. Matched, fully controllable photomultiplier detection. Zero offset ±150%. Reversible output polarity: ortscale ir-.rantaneous recording of absorption and fluorescence. E!' trie; ;-nd meter readout. Self-checking ratio. iettif tc:3romics: Modular—You need buy only what you need, add i-i j · ι rial cost compares very favorably with competitive sysf«n-. f-eliabitity: outstanding. Value to you of higher accuracy, greater sensitivity, versatility ? More uf your colleagues have selected the SD 3000 than any ilht-r L ,'t.ii 4ti.notely comparable system. After due consideration. Thn Schoeffel SD 3000. It does more, better. if you would ke complete technical literature, a prompt and con ducing demonstration or both please write or 'phone. SCHOEFFEL IN STRUMENT CORP. · 24 Booker Street, Westwood, New Jersey 12011 t 364-7263. In Europe Schoeffel Instrument GMBH. 2351 Trappenkamp, C Strasse 2, West Germany (043731 564
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Circle No. 129 on Readers' Service Card
