{"id":305836,"date":"2024-10-19T20:56:27","date_gmt":"2024-10-19T20:56:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-109272018\/"},"modified":"2024-10-25T18:31:29","modified_gmt":"2024-10-25T18:31:29","slug":"bs-en-iso-109272018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-109272018\/","title":{"rendered":"BS EN ISO 10927:2018"},"content":{"rendered":"<p>This document specifies a general method for determining the average molecular mass and molecular mass distribution of polymers (see Reference&nbsp;[1]) from 2&nbsp;000&nbsp;g&nbsp;\u22c5&nbsp;mol<sup>\u22121<\/sup> to 20&nbsp;000&nbsp;g&nbsp;\u22c5&nbsp;mol<sup>\u22121<\/sup> by matrix-assisted laser desorption\/ionization time-of-flight mass spectrometry (MALDI-TOF-MS).<\/p>\n<p>The average molecular masses and molecular mass distributions are calculated from a calibration curve constructed using synthetic-polymer and\/or biopolymer standards. This method is therefore classified as a relative method.<\/p>\n<p>The method is not applicable to polyolefins or to polymers with a polydispersity&nbsp;&gt;1,2.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>4<b><\/td>\n<td>European foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>Introduction  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>4 Principle <br \/> 5 Reagents <br \/> 5.1 Matrices <br \/> 5.2 Solvents  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>5.3 Salts <br \/> 5.4 Molecular mass standards <br \/> 6 Apparatus <br \/> 6.1 General <br \/> 6.2 Sample introduction chamber\/target  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>6.3 Laser source <br \/> 6.4 Flight tube <br \/> 6.5 Detector <br \/> 6.6 Data recording  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>6.7 Data handling <br \/> 7 Procedure <br \/> 7.1 General <br \/> 7.2 Sample preparation <br \/> 7.2.1 General <br \/> 7.2.2 Preparation of polymer\/matrix\/salt solutions <br \/> 7.2.3 Deposition of the sample on the sample plate (target)  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>7.2.4 Preparation and spotting of biopolymer\/matrix solutions <br \/> 7.3 Instrument settings  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>7.4 Recording spectra <br \/> 8 Data acquisition and processing <br \/> 8.1 General  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>8.2 Calibration <br \/> 8.2.1 General <br \/> 8.2.2 Calibration of mass axis using synthetic-polymer standards <br \/> 8.2.3 Calibration of mass axis using biopolymer standards <br \/> 8.2.4 Self-calibration method <br \/> 8.3 Generation of calibration curve <br \/> 8.4 Signal intensity axis calibration  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>9 Expression of results <br \/> 9.1 Calculation of molecular mass distribution <br \/> 9.2 Calculation of the average molecular masses <br \/> 10 Precision <br \/> 11 Test report  <\/td>\n<\/tr>\n<tr>\n<td><b>19<b><\/td>\n<td>Annex A (normative) Calibrants  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>Annex B (informative) Precision data  <\/td>\n<\/tr>\n<tr>\n<td><b>21<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Plastics. Determination of the molecular mass and molecular mass distribution of polymer species by matrix-assisted laser desorption\/ionization time-of-flight mass spectrometry (MALDI-TOF-MS)<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2018<\/td>\n<td>22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":305838,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1177,2641],"product_tag":[],"class_list":{"0":"post-305836","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-83-080-01","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\/305836","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\/305838"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=305836"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=305836"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=305836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}