Analysis is by high performance liquid chromatography using an ultraviolet detector.
Therefore, samples must be either stored in a freezer or analyzed within 6 days after collection. It is strongly recommended that samples be refrigerated from the time they are collected until the time of analysis. Organic Methods Evaluation Branch OSHA Analytical Laboratory Salt Lake City, Utah 2. Sampling Procedure 2.1. Clean, dry 25-mL glass bubblers, fitted with matched ground joints and a fritted glass inlet.