🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS ISO 20596-2:2021

BS ISO 20596-2:2021

$142.49

Water quality. Determination of cyclic volatile methylsiloxanes in water – Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)

Published By Publication Date Number of Pages
BSI 2021 24
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This document specifies a method for the determination of certain cyclic volatile methylsiloxanes (cVMS) in environmental water samples with low density polyethylene (LDPE) as a preservative and subsequent liquid-liquid extraction with hexane containing 13C-labeled cVMS as internal standards. The extract is then analysed by gas chromatography-mass spectrometry (GC-MS).

NOTE

Using the 13C-labeled, chemically identical substances as internal standards with the same properties as the corresponding analytes, minimizes possible substance-specific discrimination in calibrations. Since these substances are least soluble in water, they are introduced via the extraction solvent hexane into the system.

This document is applicable to the measurement of the following cVMS in rivers, streams, and waste water (influent and effluent):

Table 1
Analytes determined by this method
a

CAS-RN Chemical Abstracts Services Registration Number

This method can be used to determine cVMS from 0,1 µg/l to 250 ?g/l. In well controlled laboratory environments, where contamination is minimized, the lower end of the application range can be diminished by a factor of up to 10.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
4 Principle
4.1 Principle of preservation and extraction
5 Interferences
5.1 Interferences with sampling and processing
5.2 Interferences with GC-MS
11 5.3 Interferences determination
6.4.1 Reference substances
6.4.2 Calibration stock solution 1
6.4.3 Calibration stock solution 2
6.4.4 Calibration stock solution 3
6 Reagents
6.5 Spiking stock solutions
6.5.1 Spiking stock solution 1
12 6.5.2 Spiking stock solution 2
6.6 Internal standard working solution
6.6.1 Individual internal standards
6.6.2 Internal standard stock solution 1
6.6.3 Internal standard stock solution 2
6.6.4 Internal standard working solution
6.7 Calibration standards
13 7 Apparatus
7.1 Gas chromatograph/mass spectrometer
7.2 GC columns
14 8 Method detection limits
9 Quality control
10 Sampling and storage
10.1 Sampling preparation
10.2 Sample collection
11 Extraction and analysis
11.1 Extraction
15 11.2 GC conditions and operation
12 Calibration
12.1 General requirements
12.2 Calibration calculations
16 12.3 Concentration calculations
12.4 Calculation of results
17 12.5 Treatment of results lying outside the calibration range
13 Expression of results
14 Test report
19 Annex A (informative) GC-MS conditions
20 Annex B (informative) Method detection limit and limit of quantification
21 Annex C (informative) Example quality control samples
22 Annex D (informative) Performance data
23 Bibliography

Related products

BS ISO 20596-2:2021
$142.49