It is said USEPA Method 9040C is to determine pH of solid sample of moisture content of 20% what could be the method to be used to determine its pH if the moisture content as low as 0% or will it can be considered as inert?
To test a solid sample with 0 percent moisture, the USEPA recommends using Method 7471A. This method is called "Mercury in Solids and Solutions by Thermal Decomposition, Amalgamation, and Atomic Absorption Spectrophotometry." It is specifically designed for the determination of mercury in solid samples. Remember to follow the specific guidelines and procedures outlined in the method for accurate results.