Page:NIOSH Manual of Analytical Methods - 7082.pdf/4

 LEAD by Flame AAS: Method 7082, Issue 2, dated 15 August 1994 - Page 4 of 7 Species Pb metal Pb metal PbO PbS PbO2 PbO2 Pb in paint* Pb in paint*

Digestion Method HNO3 only HNO3 + H2O2 HNO3 only HNO3 only HNO3 only HNO3 + H2O2 HNO3 only HNO3 + H2O2

Analytical Recovery, % 92 ± 4 103 ± 3 93 ± 4 93 ± 5 82 ± 3 100 ± 1 95 ± 6 95 ± 6

Additional collection efficiency studies were also done using Gelman GN-4 filters for the collection of Pb fume, which had geometric mean diameter of 0.1 µm [2]. Mean collection efficiency for 24 sampling runs at flow rates between 0.15 and 4.0 L/min was> 97 ± 2%. Overall precision, rT, was 0.072 for lead nitrate aerosol [1,9] and 0.068 for Pb fume [2,4].
 * Standard Reference Material #1579, U.S. National Institute of Standards and Technology.

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METHOD REVISED BY: NIOSH Manual of Analytical Methods (NMAM), Fourth Edition