Sample should be refrigerated during collection. Record 24-hour total volume on tube. Record 24-hour total volume on tube.
Adequate refrigeration is the most important aspect of specimen preservation.
Preservation can be enhanced by adjusting the pH to 2-4. A large number of substances may interfere with this test. Decreases may be caused by carbamazepine, cephaloridine, cephalothin, chlormerodrin, digoxin, glucose, metyrapone, promazine, propoxyphene, reserpine and others. Increases may be caused by acetone, acetophenide, ascorbic acid, chloramphenicol, chlorothiazide, chlorpromazine, cloxacillin, dexamethasone, erythromycin, ethinamate, etryptamine, methicillin, methyprylon, morphine, oleandomycin, oxacillin, penicillin, phenaglycodol, phenazopyridine, phenothiazine, piperidine, quinidine, secobarbital, spironolactone and others. Inc. All Rights Reserved.