In this section
Random or Timed Urine in PLAIN container
Laboratory note:
Random Urine: Acidify urine with 1M NaOH within 2hrs of collection. See SR-W-012.
Timed Urine: Acidify urine with 1M NaOH within 2hrs of collection and allow to stand for 2 hours prior to testing. See SR-W-012.
As requested