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BS ISO 23646:2022

BS ISO 23646:2022

$167.15

Soil quality. Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD)

Published By Publication Date Number of Pages
BSI 2022 38
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
10 2 Normative references
3 Terms and definitions
11 4 Principle
12 5 Interferences
5.1 Interference with sampling and extraction
5.2 Interference with GC
6 Safety remarks
7 Reagents
7.1 General
7.2 Reagents for extraction
13 7.3 Reagents for clean-up
7.3.1 Clean-up A using aluminium oxide
7.3.2 Clean-up B using silica gel 60 for column chromatography
7.3.3 Clean-up C using gel permeation chromatography (GPC)
14 7.3.4 Clean-up D using Florisil®
7.4 Reagents for gas chromatographic analysis
7.5 Standards
7.5.1 General
7.5.2 Calibration standards
7.5.3 Internal, extraction and injection standards
17 7.6 Preparation of standard solutions
7.6.1 Preparation of calibration standard solutions of OCPs
7.6.2 Preparation of internal standard solution
7.6.3 Preparation of injection standard solution
7.6.4 Preparation of solution for liner checking
18 8 Apparatus
8.1 Extraction and clean-up procedure
8.1.11 Quartz wool or silanized glass wool.
8.2 Gas chromatograph
8.2.1 General
19 8.2.2 Capillary columns
9 Sample storage and pre-treatment
9.1 Sample storage
9.2 Sample pretreatment
10 Procedure
10.1 Blank test
10.2 Extraction
10.2.1 General
20 10.2.2 Extraction procedure 1 — Agitation or sonication
21 10.2.3 Extraction procedure 2 — Pressurized liquid extraction (PLE)
10.2.4 Extraction procedure 3 — Soxhlet
10.3 Concentration
22 10.4 Clean-up of the extract
10.4.1 General
10.4.2 Clean-up A — Aluminium oxide
10.4.3 Clean-up B — Silica gel
23 10.4.4 Clean-up C — Gel permeation chromatography
10.4.5 Clean-up D — Florisil® 2)
10.5 Addition of the injection standard
10.6 Gas chromatographic analysis (GC)
10.6.1 General
24 10.6.2 Setting the gas chromatograph
10.7 Mass spectrometry (MS)
10.7.1 Mass spectrometric conditions
25 10.7.2 Calibration of the method using an internal standard
26 10.7.3 Measurement
10.7.4 Identification
10.7.5 Check on method performance
27 10.7.6 Calculation
28 10.8 Electron capture detection (ECD)
10.8.1 General
10.8.2 ECD conditions
10.8.3 Calibration of the method using an internal standard
10.8.4 Measurement
10.8.5 Identification
29 10.8.6 Check on ECD method performance
30 10.8.7 Calculation
11 Performance characteristics
12 Precision
13 Test reports
31 Annex A (informative) Repeatability and reproducibility data
34 Annex B (informative) Calibration strategy
35 Annex C (informative) Example of GC-MS/MS measurement conditions for OCPs
37 Bibliography

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BS ISO 23646:2022
$167.15