Analytical Balance. The analytical balance used to determine the weights of all filters shall have a precision (standard deviation) of 2 μg and a resolution of 1 μg (1 digit = 1 μg) specified by the balance manufacturer.
Analytical Balance. 9. COUNTY shall submit a QC sample for CONTRACTOR analysis from time to time to check accuracy and precision of analysis. QC sample will not be identified as such.
Analytical Balance. The analytical balance used to determine the filter weight shall meet the linearity verification criterion of paragraph 9.2., table 6. This implies a precision (standard deviation) of at least 2 µg and a resolution of at least 1 µg (1 digit = 1 µg).
