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Amphetamine and Related Drugs

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Practical TLC Urine Tests<br />

The urine sample is not hydrolyzed for Test B. The<br />

urine sample is adjusted to pH 10 with potassium<br />

carbonate. Sodium chloride is also added <strong>and</strong> the<br />

mixture is extracted twice with chloroform. The<br />

chloroform phase each time is removed <strong>and</strong> filtered.<br />

The pooled chloroform extracts are washed with a<br />

weak solution of ammonium hydroxide. The washed<br />

chloroform is then extracted twice with 1 N sulfuric<br />

acid.<br />

acid<br />

4/27/2009 ٦٨

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