1VAC30-45-773: Chemical testing: quality of standards and reagents

A. The source of standards shall comply with 1VAC30-45-740 C.

B. Reagent quality, water quality and checks.

1. Reagents. In methods where the purity of reagents is not specified, analytical reagent grade shall be used. Reagents of lesser purity than those specified by the test method shall not be used. The labels on the container should be checked to verify that the purity of the reagents meets the requirements of the particular test method. Such information shall be documented.

2. Water. The quality of water sources shall be monitored and documented and shall meet method specified requirements.

3. The laboratory will verify the concentration of titrants in accordance with written laboratory procedures.