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JJF 1508-2015 English PDF

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JJF 1508-2015: Primary Method of Isotopic Abundance Measurement
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1508-2015	English	489	Add to Cart	4 days [Need to translate]	Primary Method of Isotopic Abundance Measurement	Valid	JJF 1508-2015

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Basic data

Standard ID	JJF 1508-2015 (JJF1508-2015)
Description (Translated English)	Primary Method of Isotopic Abundance Measurement
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Classification of International Standard	17.020
Word Count Estimation	21,220
Date of Issue	2015-01-30
Date of Implementation	2015-04-30
Quoted Standard	JJF 1001-2011; JJF 1135-2005
Regulation (derived from)	The State Administration of Quality Supervision, Inspection and Quarantine Announcement 2015 No. 19
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This Standard applies to the use of inductively coupled plasma mass spectrometry (ICP-MS), thermal ionization mass spectrometry (TIMS), isotope ratio mass spectrometry (IRMS) and other types of mass spectrometer to accurately measure the isotopic abundances of elements, composition or isotopic ratios.

JJF 1508-2015: Primary Method of Isotopic Abundance Measurement

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Primary Method of Isotopic Abundance Measurement People's Republic of China National Metrology Technical Specifications Isotopic abundance measurement baseline methodology Issued on. 2015-01-30 2015-04-30 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Isotopic abundance measurement baseline methodology Focal point. the National Technical Committee stoichiometric physical Drafting units. China Institute of Metrology This specification stoichiometric commissioned National Technical Committee is responsible for the physical interpretation The main drafters of this specification. Wang Jun (China Institute of Metrology) Drafters participate. Any Tongxiang (China Institute of Metrology) Lu Hai (China Institute of Metrology)

Introduction (Ⅲ) 1 Scope (1) 2. References (1) 3 Terms and definitions (1) 3.1 Isotopes (1) 3.2 isotopic abundance (1) 3.3 isotopic composition (1) Isotope ratio of 3.4 (1) 3.5 enriched isotopes (1) 3.6 mass discrimination (1) 3.7 mass discrimination correction factor (1) 3.8 isotopic certified reference material (1) 3.9 concentrated isotope diluent certified reference materials (2) 3.10 isobaric (2) 4 Overview (2) 5 reagents, utensils and equipment (3) 5.1 concentrated isotope reagent (3) 5.2 Containers (3) Balance 5.3 (3) 5.4 Other reagents and Environment (3) 6 calibration sample preparation (3) 6.1 concentrated isotope reagent purification (3) Purity Analysis 6.2 (3) 6.3 enriched isotopes isotope reagent composition determination (3) 6.4 calibration sample preparation (4) 7 Isotope Ratio for correction calculation formulated value (4) 8 mass spectrometry (4) 8.1 Instruments operations (4) 8.2 Measurement Program Design (5) 8.3 overcoming mass spectrometry interference (5) 9 calculated correction coefficient (5) 9.1 calibration sample was concentrated isotope ratio (5) 9.2 calibration sample other isotope ratio (5) 10 isotope ratio of the sample correction (6) Uncertainty Evaluation and represented 11 (6) 11.1 Uncertainty correction factor (6) Uncertainty 11.2 sample to be tested (6) 11.3 Synthesis and Expanded Uncertainty (7) 12 Quality Control (7) Appendix A Application examples. ytterbium isotope ratio measurement (8) Appendix B Calibration Sample Preparation and Evaluation of Uncertainty value represented (12)

Introduction

This specification is to guide the isotope measurements on the basis of measurement specifications. Development of this specification with reference to the IUPAC relative atomic mass and isotopic abundances Commission technical document "represents phase Terminology isotope ratio and the ratio of gas assembly "(ExplanatoryGlossaryofTermsUsedinEx- pressionofRelativeIsotopeRatiosandGasratios). This specification is the first release. Isotopic abundance measurement baseline methodology

1 Scope

Isotopic abundance measurement reference method is suitable for the use of inductively coupled plasma mass spectrometry (ICP-MS), thermal ionization Mass spectrometry (TIMS), accurate measurement of isotope ratio mass spectrometer (IRMS) and other types of mass spectrometry isotopic element Degree, composition or isotopic ratios. 2. References JJF 1001-2011 common measurement terms and definitions JJF 1135-2005 chemical analysis Measurement Uncertainty For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 Terms and definitions

3.1 Isotope isotope Having the same number of protons, different atoms of different number of neutrons (or a different mass number) of the same element. 3.2 isotopic abundance isotopicabundance Isotopic atoms in the total number of atoms of elements in percentage (%). 3.3 isotopic composition isotopiccomposition An element or atomic weight percentage ratio of each isotope in the share, and their sum is equal to 1. 3.4 Isotope ratio isotoperatio Two isotopes of moles or number of atoms, ions or number than the number. 3.5 enriched isotopes isotope-enrichedmaterial Isotopically enriched material obtained by the method. Note. There are commonly used gaseous diffusion enrichment methods, electromagnetic separation method. 3.6 mass discrimination massdiscriminationeffect When the sample mass spectrometry, ion movement is inversely proportional to the square root of its mass velocity in the sample dissociation Or atomization, ionization, ion transmission and detection process, due to the different quality of light and heavy isotopes led to its behavior Differences, resulting in two measurement values isotope ion flow ratio deviates from the true value; and the quality difference between the two isotopes The larger the measured value and the true value of the degree of deviation is greater. 3.7 mass discrimination correction factor massdiscriminationfactor, K For correcting the mass discrimination factor, otherwise known as mass bias correction factor. K is represented as an element of a Preparation for isotope ratio than the value of its measured values. K = Rcalc Rmeas 3.8 isotopic certified reference materials certifiedisotopicreferencematerial Given isotopic abundances or abundance than the certified values, with material that standard certificate.

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