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Recoveries were 35 to 45% for androstanolone, oxymetholone, chlorotestosterone- acetate, dehydromethyltestosterone, dehydrotestosterone, fluoxymesterone, mestanolone, methyltestosterone, and nandrolone; 52% for mesterolone, trenbolone; 65% for bolasterone; 24% for methenolone and 17% for stanozolol. bodybuilding video clips Us steroids. Limits of detection were 0. 002 to 0. 05 ng/mg and of quantitation were 0. bodybuilding video clips Medicine and anabolic steroids. 02 to 0. 1 ng/mg. Seven white male steroid abusers provided head hair samples (10 to 63 mg) and urine. bodybuilding video clips Anabolic diet results. In the hair samples, methyltestosterone was detected in two (confirmed in urine); nandrolone in two (also confirmed in urine); dehydromethyltestosterone in four (but not found in urine); and clenbuterol in one (but not in urine). Oxymethalone was found in urine in one, but not in the hair. One abuser had high levels of testosterone: 0. 15 ng/mg hair, and 1190 ng/mL urine. These researchers conclude that head hair analysis has considerable potential for the detection and monitoring of steroid abuse. Discussion: When seeking to find out what chemicals are present in a sample (e. g. , hair), you have to be able to effectively separate all the different substances it is made of. Usually this is done on the basis of differences in solubility, using fractional crystallization, or by differences in volatility, using distillation, of the different substances it contains. Chromatography is the most widely used technique used in chemistry to separate substances. It can be used on liquid or gas solutions. It was originally used about 90 years ago to separate different color pigments in plants, hence the root "chroma" which is Greek for "color". Once a solution or gas is produced of the desired sample, the different chemicals in the sample will have different absorption characteristics in a solid or liquid phase medium.
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