{"id":363585,"date":"2024-10-20T01:46:26","date_gmt":"2024-10-20T01:46:26","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-20596-22021\/"},"modified":"2024-10-26T02:46:45","modified_gmt":"2024-10-26T02:46:45","slug":"bs-iso-20596-22021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-20596-22021\/","title":{"rendered":"BS ISO 20596-2:2021"},"content":{"rendered":"

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 13<\/sup>C-labeled cVMS as internal standards. The extract is then analysed by gas chromatography-mass spectrometry (GC-MS).<\/p>\n

\n
\n NOTE\n <\/div>\n

Using the 13<\/sup>C-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.<\/p>\n<\/div>\n

This document is applicable to the measurement of the following cVMS in rivers, streams, and waste water (influent and effluent):<\/p>\n

\n
\n Table 1\n <\/div>\n
\n Analytes determined by this method\n <\/div>\n
\n
\n
\n a<\/sup>\n <\/div>\n

CAS-RN Chemical Abstracts Services Registration Number<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

This method can be used to determine cVMS from 0,1 \u00b5g\/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.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nNational foreword <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
10<\/td>\n3 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 <\/td>\n<\/tr>\n
11<\/td>\n5.3 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 <\/td>\n<\/tr>\n
12<\/td>\n6.5.2 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 <\/td>\n<\/tr>\n
13<\/td>\n7 Apparatus
7.1 Gas chromatograph\/mass spectrometer
7.2 GC columns <\/td>\n<\/tr>\n
14<\/td>\n8 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 <\/td>\n<\/tr>\n
15<\/td>\n11.2 GC conditions and operation
12 Calibration
12.1 General requirements
12.2 Calibration calculations <\/td>\n<\/tr>\n
16<\/td>\n12.3 Concentration calculations
12.4 Calculation of results <\/td>\n<\/tr>\n
17<\/td>\n12.5 Treatment of results lying outside the calibration range
13 Expression of results
14 Test report <\/td>\n<\/tr>\n
19<\/td>\nAnnex A (informative) GC-MS conditions <\/td>\n<\/tr>\n
20<\/td>\nAnnex B (informative) Method detection limit and limit of quantification <\/td>\n<\/tr>\n
21<\/td>\nAnnex C (informative) Example quality control samples <\/td>\n<\/tr>\n
22<\/td>\nAnnex D (informative) Performance data <\/td>\n<\/tr>\n
23<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Water quality. Determination of cyclic volatile methylsiloxanes in water – Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":363595,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[216,2641],"product_tag":[],"class_list":{"0":"post-363585","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-060-50","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/363585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/363595"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=363585"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=363585"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=363585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}