Analytical measurements. The quan- tity of CO2 evolved is measured by ti- tration of the entire Ba(OH)2 sample (10 mL Ba(OH)2+10 mL rinse water) with
Analytical measurements. (i) Water quality analysis. The hardness, acidity, alkalinity, pH, conductivity, TOC or COD, and particulate matter of the di- lution water shall be measured at the beginning of each definitive test.
(ii) Collection of samples for measure- ment of test substance. Each sample to be analyzed for the test substance con- centrations shall be taken at a location midway between the top, bottom, and sides of the test chamber. Samples should not include any surface scum or material dislodged from the bottom or sides. Samples shall be analyzed imme- diately or handled and stored in a man- ner which minimizes loss of test sub- stance through microbial degradation, photogradation, chemical reaction, volatilization, or sorption.
