Invalid Result Abnormal Ph. Rejected for Testing Fatal Flaw. The result of a drug test for a urine specimen that contains an unidentified adulterant or an unidentified interfering substance has abnormal physical characteristics or has an endogenous substance at an abnormal concentration that prevents the laboratory from completing or obtaining a valid drug test result.
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A low urine pH acidic urine may indicate. A high urine pH alkaline urine may indicate. The pH scale otherwise known as the acid-base scale runs from 0 to 14.
A laboratory will report an invalid drug test the moment any of the following conditions take place.
A normal urine specimen has a pH between 5 and 8. Gastric suction Renal or Kidney failure Renal or Kidney tubular acidosis Urinary tract infection Vomiting. Rejected for Testing - Fatal Flaw. Adulterated - pH.
