EN 237:2004

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Sampling
7 Procedure
   7.1 General preparation
   7.2 Preparation of calibration solutions (0,25 mg/l,
        0,50 mg/l, 0,75 mg/l, and 1,0 mg/l of lead)
   7.3 Preparation of the test solution
   7.4 Preparation of instrument
   7.5 Determination
8 Calculation
9 Expression of results
10 Precision
   10.1 General background
   10.2 Repeatability, r
   10.3 Reproducibility, R
11 Test report
Annex A (informative) Alternative procedure
Bibliography

This document specifies an atomic absorption spectrometric test method for the determination of the lead content of petrol in the range 2,5 mg/l to 10,0 mg/l. This test method is independent of the lead alkyl type.NOTE 1Annex A describes an alternative procedure but with a poorer precision for the determination of the lead content of petrol in the range 3,0 mg/l to 10,0 mg/l. This procedure is also independent of the lead alkyl type.NOTE 2For the purposes of this document, the term "% (V/V)" is used to represent the volume fraction.WARNING - The use of this document may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.