BS 1747-13:1994

Committees responsible
National foreword
Method
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling
7 Procedure
8 Expression of results
9 Performance of methods
10 Interferences
11 Test report
Annexes
A (normative) Filter digestion by reflux with nitric
    acid and hydrochloric acid
B (normative) Filter digestion with nitric acid and
    hydrogen peroxide
C (normative) Filter digestion under pressure with
    nitric acid

Deposits greater than 1μ, with an option for those less than 1μ.

This International Standard specifies a method based on acid digestion and atomic absorption spectrometry for the chemical analysis of lead samples collected on filters from ambient air. The method is applicable to ambient air samples with particulate lead contents, such that the amount of deposited particulate lead collected on the filter of the sampling equipment is greater than 1 µg if the final determination is made by flame atomic absorption spectrometry. Final determination by graphite furnace atomic absorption spectrometry allows measurement of quantities of less than 1 µg, but is only applicable after experimental validation of detection limits.