Five field blank samples were transported along with each
sampler batch to the selected sites, stored in the laboratory
during the exposure period, and later used to check the possible contamination during the collection, transportation and storage of samples. In this study, itwas found that the concentration in each blank tube was mostly below MDL which were defined as three times the standard deviation (S.D.) of seven blank values.
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[18 มิ.ย. 2553 13:40]
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