{"id":309090,"date":"2024-10-19T21:13:19","date_gmt":"2024-10-19T21:13:19","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-212572018\/"},"modified":"2024-10-25T18:54:38","modified_gmt":"2024-10-25T18:54:38","slug":"bs-iso-212572018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-212572018\/","title":{"rendered":"BS ISO 21257:2018"},"content":{"rendered":"

This document specifies a method for the determination of the residual acrylonitrile monomer and styrene monomer in polymer polyols by gas chromatography.<\/p>\n

PDF Catalog<\/h4>\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
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Principle <\/td>\n<\/tr>\n
10<\/td>\n5 Reagents and materials
6 Apparatus <\/td>\n<\/tr>\n
11<\/td>\n7 Preparation of calibration solution and sample solution
7.1 General
7.2 Method A for using OT column
7.2.1 Preparation of internal standard solution
7.2.2 Preparation of calibration solutions <\/td>\n<\/tr>\n
12<\/td>\n7.2.3 Preparation of sample solution
7.3 Method B for using packed column
7.3.1 Preparation of internal standard solution
7.3.2 Preparation of calibration solutions
7.3.3 Preparation of sample solution <\/td>\n<\/tr>\n
13<\/td>\n8 Procedure
8.1 Gas chromatographic procedure
8.2 Measurement of sample solutions and calibration solutions <\/td>\n<\/tr>\n
14<\/td>\n8.3 Evaluation of gas chromatographic peak
9 Expression of the results
9.1 Preparation of the calibration curve <\/td>\n<\/tr>\n
15<\/td>\n9.2 Calculation of results from a calibration graph <\/td>\n<\/tr>\n
16<\/td>\n9.3 Calculation of results from a single-point calibration
9.4 Acceptability of results and measurement sensitivity
10 Precision <\/td>\n<\/tr>\n
17<\/td>\n11 Test report <\/td>\n<\/tr>\n
18<\/td>\nAnnex A (informative) Typical analytical conditions <\/td>\n<\/tr>\n
20<\/td>\nAnnex B (informative) Typical examples of GC chromatogram <\/td>\n<\/tr>\n
22<\/td>\nAnnex C (informative) Precision <\/td>\n<\/tr>\n
23<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Plastics. Polymer polyols for use in the production of polyurethane. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2018<\/td>\n24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":309093,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1178,2641],"product_tag":[],"class_list":{"0":"post-309090","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-83-080-10","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\/309090","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\/309093"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=309090"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=309090"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=309090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}