“CUSTOMERS REALLY ONLY WANT THE CHROMATOGRAM.WE MAKE SURE THEY GET IT – GUARANTEED.”We take responsibly for all components of a method from the column, instrument and reagents.These methods are robust, rugged and very analyte selective.MARIA OFITSEROVA / SENIOR RESEARCH CHEMISTSAREETA NERKAR / RESEARCH CHEMISTAlthough multiuse, HPLC’s arevery specific when in use.
METHOD ABSTRACTS110 / AFLATOXINSTOXINS IN PEANUTS, VEGETABLE MATTER, AND MILKAa<strong>to</strong>xins occur naturally in peanuts, peanut meal, cot<strong>to</strong>nseed meal, corn, dried chili pepper, etc. However, the growthof mold does not always indicate the presence of <strong>to</strong>xin since the yield of Aa<strong>to</strong>xins is dependent on growth conditionssuch as moisture, temperature, and aeration. The Aa<strong>to</strong>xins are characterized as B for blue uorescence and G for greenuorescence. The numerical subscripts indicate relative chroma<strong>to</strong>graphic mobility. Besides the <strong>to</strong>xins commonly found invegetable matter (B1, B2, G1, and G2), Aa<strong>to</strong>xins M (for milk) are found in milk of cows fed <strong>to</strong>xic meals. The highly <strong>to</strong>xicM metabolites are 4-hydroxylated Bs.The most important feature of the post-column method described here is that all f<strong>our</strong> Aa<strong>to</strong>xins are detectable at the sameuorescence emission wavelength in a single run. The <strong>Pickering</strong> Pinnacle PCX with a 1.4 mL reac<strong>to</strong>r is recommended forthis method.METHODAnalytical ConditionsColumn: MYCOTOX column, <strong>Catalog</strong> No. 1612124Temperature: 42 °CFlow Rate: 1.0 mL/minMobile Phase: MeOH, CH 3CN, H 2O; 22:22:56, IsocraticPost-column ConditionsPost-column System: Pinnacle PCX with 1.4 mL reac<strong>to</strong>rTemperature: 95 °CReagent: I2 100 mg/L in waterFlow Rate: 0.31 mL/minDetection: Fluorometer, Xenon lamp ex: 365 nm, em: 430 nmG1 B2B197M2M1G2REFERENCES1) R. Buchi in “Afl a<strong>to</strong>xins,” L. Goldblat, Ed., Academic Press,New York, NY (1969)2) C.W. Thorp, G.M. Ware, and A.E. Pohland,“Proceedings of the 5thInternational IUPAC Symposium on Myco<strong>to</strong>xins and Phyco<strong>to</strong>xins,”W. Pfannhauser and P.B. Czedic-Eysenberg (Eds.),Technical University, Vienna (1982) 52–5502 468 10 12 14min3) J.W. Dorner & R.J. Cole, J.A.O.A.C., 71 (1988) 43–474) M.J. Shepherd and J. Gilbert, Food Additives Contaminants, 1(1984) 325–335PRODUCT CATALOGPICKERING LABORATORIES10/11
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TABLE OF CONTENTSINTRODUCTION3 Cust
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INTRODUCTIONINSTALLATION & TRAINING
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“A LOT HAS CHANGED SINCE PRODUCIN
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INSTRUMENTS & HARDWAREFEATURE HIGHL
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INSTRUMENTS & HARDWARE• Indoor us
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INSTRUMENTS & HARDWARECRX400 POST-C
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CHROMATOGRAMS, COLUMNS & GUARDSPick
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