{"id":284942,"date":"2024-10-19T19:17:38","date_gmt":"2024-10-19T19:17:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-208992018\/"},"modified":"2024-10-25T16:07:58","modified_gmt":"2024-10-25T16:07:58","slug":"bs-iso-208992018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-208992018\/","title":{"rendered":"BS ISO 20899:2018"},"content":{"rendered":"<p>This document specifies methods used to determine the concentration of plutonium and neptunium isotopes in water by inductively coupled plasma mass spectrometry (ICP-MS) (<sup>239<\/sup>Pu,<sup>240<\/sup>Pu,<sup>241<\/sup>Pu and<sup>237<\/sup>Np). The concentrations obtained can be converted into activity concentrations of the different isotopes<sup>[<\/sup><sup>9<\/sup><sup>]<\/sup>.<\/p>\n<p>Due to its relatively short half-life and<sup>238<\/sup>U isobaric interference,<sup>238<\/sup>Pu can hardly be measured by this method. To quantify this isotope, other techniques can be used (ICP-MS with collision-reaction cell, ICP-MS\/MS with collision-reaction cell or chemical separation). Alpha spectrometry measurement, as described in ISO&nbsp;13167<sup>[<\/sup><sup>10<\/sup><sup>]<\/sup>, is currently used<sup>[<\/sup><sup>11<\/sup><sup>]<\/sup>.<\/p>\n<p>This method is applicable to all types of water having a saline load less than 1&nbsp;g\u00b7l<sup>\u22121<\/sup>. A dilution of the sample is possible to obtain a solution having a saline load and activity concentrations compatible with the preparation and the measurement assembly.<\/p>\n<p>A filtration at 0,45&nbsp;\u03bcm is needed for determination of dissolved nuclides. Acidification and chemical separation of the sample are always needed.<\/p>\n<p>The limit of quantification depends on the chemical separation and the performance of the measurement device.<\/p>\n<p>This method covers the measurement of those isotopes in water in activity concentrations between around<sup>[<\/sup><sup>12<\/sup><sup>][<\/sup><sup>13<\/sup><sup>]<\/sup>:<\/p>\n<ul>\n<li>\n<p>1&nbsp;mBq\u00b7l<sup>\u22121<\/sup> to 5&nbsp;Bq\u00b7l<sup>\u22121<\/sup> for<sup>239<\/sup>Pu,<sup>240<\/sup>Pu and<sup>237<\/sup>Np;<\/p>\n<\/li>\n<li>\n<p>1&nbsp;Bq\u00b7l<sup>\u22121<\/sup> to 5&nbsp;Bq\u00b7l<sup>\u22121<\/sup> for<sup>241<\/sup>Pu.<\/p>\n<\/li>\n<\/ul>\n<p>In both cases, samples with higher activity concentrations than 5&nbsp;Bq\u00b7l<sup>\u22121<\/sup> can be measured if a dilution is performed before the chemical separation.<\/p>\n<p>It is possible to measure<sup>241<\/sup>Pu following a pre-concentration step of at least 1&nbsp;000.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Water quality. Plutonium and neptunium. Test method using ICP-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":284947,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-284942","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/284942","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\/284947"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=284942"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=284942"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=284942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}