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Measurement and Results - Eliminating high and erratic lead (Pb) blanks

 
Do you know of a published paper with the values listed in your article Environmental Contamination: Table 8.1, Effect of Laboratory Atmosphere on Pb Blank Levels. We are having some problems with the lead blanks values (ICP-MS), which appear quite random.
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We used to use leaded gasoline in the USA, making ppb level Pb determinations nearly impossible. The basic rule back then was to work in the hood only if you must as it was the greatest area for contamination because of increased air exposure, but always keep the sample covered. Most contamination today is from apparatus and reagents. We would like to suggest that you perform blanks in and away from the hood and covered and uncovered, with varying amounts of reagents etc. in order to identify the source of contamination (air, apparatus, operator, or reagents). All four areas come into play with trace Pb determinations and each laboratory must perform their personal studies to identify, and hopefully eliminate, high and erratic blanks.
Posted: 09/05/18 21:52:44

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