{"id":381841,"date":"2024-10-20T03:13:21","date_gmt":"2024-10-20T03:13:21","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-18589-52021\/"},"modified":"2024-10-26T05:51:20","modified_gmt":"2024-10-26T05:51:20","slug":"bs-en-iso-18589-52021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-18589-52021\/","title":{"rendered":"BS EN ISO 18589-5:2021"},"content":{"rendered":"

This document describes the principles for the measurement of the activity of90<\/sup>Sr in equilibrium with90<\/sup>Y and89<\/sup>Sr, pure beta emitting radionuclides, in soil samples. Different chemical separation methods are presented to produce strontium and yttrium sources, the activity of which is determined using proportional counters (PC) or liquid scintillation counters (LSC).90<\/sup>Sr can be obtained from the test samples when the equilibrium between90<\/sup>Sr and90<\/sup>Y is reached or through direct90<\/sup>Y measurement. The selection of the measuring method depends on the origin of the contamination, the characteristics of the soil to be analysed, the required accuracy of measurement and the resources of the available laboratories.<\/p>\n

These methods are used for soil monitoring following discharges, whether past or present, accidental or routine, liquid or gaseous. It also covers the monitoring of contamination caused by global nuclear fallout.<\/p>\n

In case of recent fallout immediately following a nuclear accident, the contribution of89<\/sup>Sr to the total amount of strontium activity will not be negligible. This standard provides the measurement method to determine the activity of90<\/sup>Sr in presence of89<\/sup>Sr.<\/p>\n

The test methods described in this document can also be used to measure the radionuclides in sludge, sediment, construction material and products by following proper sampling procedure.<\/p>\n

Using samples sizes of 20 g and counting times of 1 000 min, detection limits of (0,1 to 0,5) Bq\u00b7kg-1<\/sup> can be achievable for90<\/sup>Sr using conventional and commercially available proportional counter or liquid scintillation counter when the presence of89<\/sup>Sr can be neglected. If89<\/sup>Sr is present in the test sample, detection limits of (1 to 2) Bq\u00b7kg-1<\/sup> can be obtained for both90<\/sup>Sr and89<\/sup>Sr using the same sample size, counting time and proportional counter or liquid scintillation counter as in the previous situation.<\/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\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
4<\/td>\nEuropean foreword <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
11<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
12<\/td>\n3 Terms and definitions
3.1 Terms and definitions
3.2 Symbols <\/td>\n<\/tr>\n
13<\/td>\n4 Principle
4.1 General
4.2 Chemical separation <\/td>\n<\/tr>\n
14<\/td>\n4.3 Detection
4.3.1 General
4.3.2 Source preparation for liquid scintillation counter
4.3.3 Source preparation for proportional counter
4.3.4 Background determination <\/td>\n<\/tr>\n
15<\/td>\n5 Chemical reagents and equipment
6 Procedure of strontium desorption
6.1 Principles <\/td>\n<\/tr>\n
16<\/td>\n6.2 Technical resources
6.2.1 Equipment
6.2.2 Chemical reagents
6.3 Procedure <\/td>\n<\/tr>\n
17<\/td>\n7 Chemical separation procedure by precipitation
7.1 Principles
7.2 Technical resources
7.2.1 Equipment <\/td>\n<\/tr>\n
18<\/td>\n7.2.2 Chemical reagents
7.3 Procedure
7.3.1 Separation of alkaline metals and calcium <\/td>\n<\/tr>\n
19<\/td>\n7.3.2 Separation of barium, radium and lead
7.3.3 Separation of fission products and yttrium
7.3.4 Strontium purification <\/td>\n<\/tr>\n
20<\/td>\n7.3.5 Yttrium extraction <\/td>\n<\/tr>\n
21<\/td>\n7.3.6 Determination of the chemical yields
8 Chemical separation procedure by liquid-liquid extraction
8.1 Principle <\/td>\n<\/tr>\n
22<\/td>\n8.2 Technical resources
8.2.1 Equipment
8.2.2 Chemical reagents <\/td>\n<\/tr>\n
23<\/td>\n8.3 Procedure
8.3.1 General
8.3.2 Chemical separation of yttrium <\/td>\n<\/tr>\n
24<\/td>\n8.3.3 Source preparation to be measured by PC
8.3.4 Source preparation to be measured by LSC
8.3.5 Determination of the chemical yields <\/td>\n<\/tr>\n
25<\/td>\n9 Chemical separation procedure by chromatography (crown ether resin)
9.1 Principles
9.2 Technical resources
9.2.1 Equipment
9.2.2 Chemical reagents <\/td>\n<\/tr>\n
26<\/td>\n9.3 Procedure
9.3.1 General
9.3.2 Chemical separation of the strontium <\/td>\n<\/tr>\n
27<\/td>\n9.3.3 Determination of chemical yield
10 Measurement
10.1 General
10.2 Liquid scintillation counter
10.3 Gas flow proportional counter <\/td>\n<\/tr>\n
28<\/td>\n10.4 Calculation of counting efficiency
11 Expression of results
11.1 General
11.2 Determination of 90Sr in equilibrium with 90Y
11.2.1 Calculation of the activity per unit of mass <\/td>\n<\/tr>\n
29<\/td>\n11.2.2 Standard uncertainty
11.2.3 Decision threshold
11.2.4 Detection limit
11.3 Determination of 90Sr by the 90Y
11.3.1 Calculation of the activity per unit of mass <\/td>\n<\/tr>\n
30<\/td>\n11.3.2 Standard uncertainty
11.3.3 Decision threshold
11.3.4 Detection limit <\/td>\n<\/tr>\n
31<\/td>\n11.4 Determination of 90Sr in presence of 89Sr when 90Sr is in equilibrium with 90Y
11.4.1 Calculation of the activity per unit of mass
11.4.2 Standard uncertainty <\/td>\n<\/tr>\n
32<\/td>\n11.4.3 Decision threshold
11.4.4 Detection limit <\/td>\n<\/tr>\n
33<\/td>\n11.5 Confidence limits
12 Test report <\/td>\n<\/tr>\n
34<\/td>\nAnnex A (informative) Examples of evaluation models <\/td>\n<\/tr>\n
41<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Measurement of radioactivity in the environment. Soil – Strontium 90. Test method using proportional counting or liquid scintillation counting<\/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>\n42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":381848,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-381841","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\/381841","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\/381848"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=381841"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=381841"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=381841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}