VOCs – Drinking Water
|Synonym(s):||VOCs in Water|
|Test Description||Volatile organic compounds VOCs by GC-MS, EPA method 524.2|
|Supplemental Information Required||Measure and record the chlorine residual. If the chlorine residual is >5 mg/L, additional dechlorinating agent is required. For every mg/L of chlorine above the initial 5 mg/L add an additional 5 mg of ascorbic acid. For example: a sample with 7 mg/L chlorine would require 35 mg (25 + 5 + 5) of ascorbic acid. Be careful not to add too much dechlorinating agent to the sample because this may cause interference in the analysis.|
|Performed on Specimens from (sources)||
|Sample/Specimen Type for Testing||Drinking Water|
|Minimum Volume/Size Required||Collect two vials of drinking water and two vials of reagent water for a field blank with every sample.
Glass screw-top vial equipped with a Teflon (PTFE) faced silicone septum; 40 mL
|Storage/Preservation Prior to Shipping||
|Shipping and Specimen Handling Requirements||
|Turn-around Time||Samples must be analyzed by the lab within 14 days of collection.|
|Interferences/Limitations||Avoid collecting this type of sample in any situation where you can smell petroleum or solvent type fumes.|
|Common Causes for Rejection||Insufficient quantity, unacceptable specimen type or source, improper shipping conditions, expired media or collection container, discrepancies between specimen label and submission form, and/or incomplete or missing submission form|
Collecting Field Blanks:
Contact the laboratory at (512) 776-7587 for currently supported analyte list.