รายละเอียดเอกสาร

The result of any testing method can be no better than the sample on which it is performed. However, it is beyond the scope of Standard Methods for the Examination of Water and Wastewater to specify detailed procedures for the collection of all samples because of varied purposes and analytical procedures. Detailed information may be presented in specific methods and that information is to be followed when available. This section presents general considerations for the collection and preservation of samples applicable primarily to chemical analyses. See appropriate sections for samples to be used in toxicity testing (Section 8020) and microbiological (Sections 9020 and 9060), biological (Part 10 000), and radiological (Section 7010) examinations...