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eLibrary > BS EN 12916:2024 Petroleum products. Determination of aromatic hydrocarbon types in middle distillates. High performance liquid chromatography method with refractive index detection >

BS EN 12916:2024 Petroleum products. Determination of aromatic hydrocarbon types in middle distillates. High performance liquid chromatography method with refractive index detection, 2024

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European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Apparatus preparation
Figure 1 — Diagrammatic representation of a liquid chromatograph
Figure 2 — Chromatogram of the system calibration standard SCS1
9 Calibration
Table 1 — Concentrations of calibration standard components
Figure 3 — Chromatogram of calibration standard
10 Procedure [Go to Page]
10.1 Procedure A for diesel fuels and petroleum distillates
10.2 Procedure B for paraffinic diesel fuels
10.3 Procedure A and B continuation
Figure 4 — Chromatogram with the peaks identified and showing the integration
Figure 5 — Exemplary chromatogram of paraffinic diesel fuels with the peaks identified
11 Calculation [Go to Page]
11.1 Retention times
11.2 Column resolution
11.3 Cut times
11.4 Aromatic hydrocarbons type content
11.5 Polycyclic and total aromatic hydrocarbons content
12 Expression of results
13 Precision [Go to Page]
13.1 General
13.2 Repeatability, r
13.3 Reproducibility, R
Table 2 — Precision values for diesel fuels and petroleum distillates (procedure A)
Table 3 — Precision values for paraffinic diesel fuels (Procedure B)
14 Test report
Annex A (informative) Column selection and use
Annex B (informative) Practical instructions for paraffinic diesel fuel samples
Figure B.1 — Influence of integration methods of unequal sized asymmetrical peaks
Annex C (informative) Identification of tri+-aromatics
Figure C.1 — Chromatogram of typical diesel with UV detector
Bibliography [Go to Page]

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