NS EN 13723 : 1ED 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 flourescence
       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

Describes a method for the determination of the lead content of gasoline with a lead concentration from 4 mg/l to 25 mg/l.