EN 13723:2002

Foreword
1 Scope
2 Normative references
3 Principle
4 Chemicals and solvents
   4.1 2,2,4-trimethylpentane (isooctane)
   4.2 Toluene
   4.3 Kerosene
   4.4 Lead-2-ethylhexanoate
   4.5 Triphenylbismuth or bismuth-2-ethylhexanoate
   4.6 Ethylhexanoic acid
   4.7 Blank solution
   4.8 Lead stock solution
   4.9 Bismuth internal standard solution
5 Apparatus
   5.1 Wavelength-dispersive X-ray fluorescence
       spectrometer
   5.2 One-mark pipettes
   5.3 Volumetric flasks
   5.4 Conical flasks
   5.5 Fritted glass filter
   5.6 Analytical balance
6 Samples and sampling
7 Calibration solutions
   7.1 Preparation of lead calibration solutions
   7.2 Preparation of calibration solutions by addition
       of the internal standard
8 Calibration
   8.1 General
   8.2 Calibration graph
   8.3 Checking
9 Procedure
10 Calculation
11 Expression of results
12 Precision
   12.1 Repeatability
   12.2 Reproducibility
13 Test report

This European Standard specifies a method for the determination of the lead content of gasolines with a lead concentration from 4 mg/l to 25 mg/l.NOTEFor the purpose of this European Standard, the term "% (V/V)" is used to represent the volume fraction.WARNING: The use of this European Standard can 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.