ISO 17734-1-2026工作场所空气--采用液相色谱-质谱联用一测定空气中有机氮化合物第一部分

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Reference number

Workplace air—Determination of

organonitrogen compounds in air

using liquid chromatography and

mass spectrometry 一

Part 1:

Isocyanates using dibutylamine

derivatives

ISO 17734-1:2026(en)

International

Standard

ISO 17734-1

Third edition

2026-05

◎ISO 2026

iii

ISO 17734-1:2026(en)

Contents Page

Foreword...................................................................................................................................................................... V

Introduction .............................................................................................................................................................

vVi

1 Scope ............................................................................................................................................................... 1

2 Normative references ...................................................................................................................................

3 Terms and definitions ..................................................................................................................................1

4 Principle.......................................................................................................................................................... 2

5 Reagents and materials . ........................................................................................................................... 3

6 Preparation of standard solutions........................................................................................................... 4

6.1 Reference compounds....................................................................................................................... 4

6.2 DBA derivatives of isocyanates ........................................................................................................ 5

6.2.1 Preparation of isocyanate-DBA derivatives of commercially available isocyanates....... 5

6.2.2 Preparation of ICA and MIC-DBA....................................................................................... 5

6.2.3 Preparation of deuterium-labelled isocyanate-DBA derivatives....................................... 5

6.2.4 Characterization...................................................................................................................... 6

6.3 DBA derivatives of bulk isocyanates................................................................................................ 6

6.3.1 Preparation............................................................................................................................... 6

6.3.2 Characterization......................................................................................................................6

6.4 DBA derivatives of isocyanates in thermal decomposition products of polyurethane

(PUR) or urea-based resins............................................................................................................... 7

6.4.1 Preparation............................................................................................................................... 7

6.4.2 Characterization......................................................................................................................7

6.5 Stability.................................................................................................................................................. 7

7 Apparatus......................................................................................................................................................... 7

8 Air sampling.................................................................................................................................................. 10

8.1 Pre-sampling laboratory preparation..............................................................................................10

8.1.1 Cleaning of the sampling equipment..................................................................................10

8.1.2 Preparation of the reagent solution and extraction solution tubes.................................10

8.2 Pre-sampling field preparations......................................................................................................10

8.3 Collection of air samples................................................................................................................... 1

8.3.1 Measurement task............................................................................................................... 11

8.3.2 Impinger-filter sampling....................................................................................................... 11

8.3.3 Solvent-free sampling.......................................................................................................... 12

8.3.4 Post-sampling field preparations....................................................................................... 12

8.4 Blanks ............................................................................................................................................... 13

8.5 Raw material ..................................................................................................................................... 13

8.6 Shipment of samples....................................................................................................................... 13

9Laboratory sample preparation............................................................................................................... 13

9.1 Sample sequence...............................................................................................................................13

9.2 Work-up procedu e............................................................................................................... 13

9.2.1 General...................................................................................................................................13

9.2.2 Solvent-free sampling............................................................................................................13

10 Instrumental settings............................................................................................................................... 14

10.1 HPLC program (LC-MS)................................................................................................................... 14

10.2 HPLC program (LC-CLND)............................................................................................................... 14

10.3 Mass spectrometer ........................................................................................................................... 14

11 Data handling ............................................................................................................................................... 15

11.1 Identification...................................................................................................................................... 15

11.2 Calibration curves ........................................................................................................................... 15

11.3 Quantification................................................................................................................................... 15

12 Interferences ...............................................................................................................................................15

ISO 17734-1:2026(en)

13 Test report...................................................................................................................................... 15

14 Determination of performance characteristics ........................................................................... 16

14.1 Genera................................................................................................................................... 16

14.2 Relevant uncertainty contributions and criteria......................................................................16

14.3 Assessment of performance c h a r a c t e r i s t i c s ( f o l l o w i n g the detailed

approach in

Reference [20]) .................................................................................................................................. 16

14.3.1 Collection efficiency—Relative to particle size distribution...........................................16

14.3.2 Air sampling............................................................................................................................16

14.3.3 Analysis ............................................................................................................................... 18

14.3.4 Mass of compound in sample blank ................................................................................... 22

14.3.5 Between-laboratory uncertainty contributions .............................................................22

14.3.6 Combined uncertainty.......................................................................................................... 23

14.3.7 Expanded uncertainty....................................................................................................... 23

14.3.8 Uncertainty from performance criteria........................................................................... 23

Annex A (informative) Performance characteristics ................................................................................. 24

Annex B (informative) Examples.............................................................................................................. 26

Annex C (informative) Commercially available products.........................................................................30

Bibliography............................................................................................................................................... 31

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标签： #ISO #液相色谱 #2026

摘要：

ReferencenumberWorkplaceair—Determinationoforganonitrogencompoundsinairusingliquidchromatographyandmassspectrometry一Part1:IsocyanatesusingdibutylaminederivativesISO17734-1:2026(en)InternationalStandardISO17734-1Thirdedition2026-05◎ISO2026iiiISO17734-1:2026(en)ContentsPageForeword.......................

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ISO 17734-1-2026工作场所空气--采用液相色谱-质谱联用一测定空气中有机氮化合物第一部分

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