A sensitive thin-layer chromatography te
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Jack E. Wallace; John D. Biggs; James H. Merritt; Horace E. Hamilton; Kenneth Bl
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Article
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1972
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Elsevier Science
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English
⚖ 579 KB
A screening procedure is described for determining morphine and other narcotics in acid-hydrolyzed urine. A simple pH adjustment and extraction are followed by washing the extracting solvent with a phosphate buffer which effectively removes hydrolytic products that normally produce inferior chromato