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1 Scope 7 2 Normative references 8 3 Principle 8 4 Limitations and interferences 8 4.1 General 8 4.2 Ozone interference 9 5 Safety measures 9 6 Apparatus 10 6.1 Sampling 10 6.2 Sample preparation 11 6.3 Sample analysis 11 7 Reagents and materials 13 8 Preparation of reagents and cartridges 13 8.1 Purification of 2,4-dinitrophenylhydrazine 13 8.2 Preparation of DNPH-formaldehyde derivative 14 8.3 Preparation of DNPH-formaldehyde standards 14 8.4 Preparation of DNPH-coated silica gel cartridges 14 8.4.1 General 14 8.4.2 DNPH coating solution 15 8.4.3 Coating of silica gel cartridges 15 9 Procedure 16 9.1 Sample collection 16 9.2 Process blanks 17 9.3 Sample analysis 18 9.3.1 Sample preparation 18 9.3.2 Sample desorption 18 9.3.3 HPLC calibration 18 9.3.4 HPLC analysis for formaldehyde 21 9.3.5 HPLC analysis of other aldehydes and ketones 23 9.3.5.1 General 23 9.3.5.2 Sample analysis for other carbonyl compounds 23 10 Calculations 25 11 Performance criteria and quality assurance 26 11.1 General 26 11.2 Standard operating procedures (SOPs) 26 11.3 HPLC system performance 27 11.4 Sample loss 27 11.5 Measurement plan 27 12 Precision and uncertainty 28 13 Test report 28

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Author

DE LERBER Danielle

Language

EN

Category

reference