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BS ISO 23322:2021 pdf free

BS ISO 23322:2021 pdf free.Paints and varnishes – Determination of solvents in coating materials containing organic solvents only—Gas-chromatographic method.
To prevent condensation, the detector temperature shall be at least 10 K above the maximum oven temperature.
Flame ionization detector
The flame ionization detector (FID) is operated at temperatures between 230 °C and 300 °C. To prevent condensation, the detector temperature shall be at least 10 K above the maximum oven temperature. The detector gas supply, injection volume, split ratio and gain setting shall be optimized so that the signals (peak areas) used for the calculation are proportional to the amount of substance.
Capillary separation column
The column shall be made of glass or fused silica. Columns of sufficient length to resolve volatiles and of maximum internal diameter 0.32 mm, of a suitable polarity and with a suitable film thickness shall be used.
Analytical system performance criteria
The analytical system performance criteria shall be demonstrated. The resolution, R, of the peaks to be separated shall be at least 1,5.
For the compounds under investigation it has to be ensured that the sample concentration lies within the quantification range of the analytical system.
NOTE The limit of quantification can deviate for single compounds. If necessary, the compound specific limit of quantification can be determined for the considered single compound(s).
Injection syringe
The injection syringe for hot or cold injection systems shall have a capacity of at least twice the volume of the sample to be injected into the gas chromatograph.
Data processing
Suitable software shall be used for integration, calibration, quantification and other data handling processes.
Sample vial
A suitable sample vial is one made of chemically inert material, for example glass, which can be sealed for example with a rubber membrane having a coating of poly(tetrafluoroethylene) (PTFE). The vessel shall be filled to about 90% of capacity.
General Table 1 shows a non-exhaustive list of an internal standards and extraction solvents.BS ISO 23322 pdf download.

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