JJG 939-2009 English PDF

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JJG 939-2009: Verification Regulation for Atomic Fluorescence Spectrophotometers
Status: Valid

JJG 939: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 939-2009	399	Add to Cart	3 days	Verification Regulation for Atomic Fluorescence Spectrophotometers	Valid
JJG 939-1998	399	Add to Cart	3 days	Verification Regulation of Non-disperse Atomic Fluoreacence Spectrometer	Obsolete

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Basic data

Standard ID: JJG 939-2009 (JJG939-2009)
Description (Translated English): Verification Regulation for Atomic Fluorescence Spectrophotometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A61
Classification of International Standard: 17.220
Word Count Estimation: 17,189
Date of Issue: 2009-10-09
Date of Implementation: 2010-04-09
Older Standard (superseded by this standard): JJG 939-1998
Regulation (derived from): AQSIQ Announcement No. 113 of 2009
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to hollow cathode lamp as the light source of the principle of non-dispersive atomic fluorescence spectrometer (hereinafter referred to as the instrument) for initial verification, testing and use of follow-up inspection.

JJG 939-2009: Verification Regulation for Atomic Fluorescence Spectrophotometers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Verification Regulation for Atomic Fluorescence Spectrophotometers National Metrology Verification Regulations of the People's Republic Atomic fluorescence spectrometer Released on.2009-10-09 2010-04-09 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Atomic Fluorescence Photometer Calibration Procedure Replace JJG 939-1998 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on October 09,.2009, and Effective April 09,.2010. Focal Point. National Physical and Chemical Metrology Technical Committee Main drafting unit. Hebei Institute of Metrology Hebei Metrology Supervision and Inspection Institute Participated in the drafting unit. China Institute of Metrology Beijing Kechuang Haiguang Instrument Co., Ltd. This procedure entrusts the National Physical and Chemical Metrology Technical Committee to explain The main drafters of this procedure. Yang Xue (Hebei Institute of Metrology) Feng Jinxi (Hebei Institute of Metrology) Peng Zhongbin (Hebei Province Metrology Supervision and Inspection Institute) Participate in the drafters. Zhou Zhiheng (Beijing Kechuang Haiguang Instrument Co., Ltd.) Cui Yanjie (China Institute of Metrology)

table of Contents

1 Scope (1) 2 Overview (1) 3 Metrological performance requirements (2) 4 General technical requirements (2) 5 measuring instrument control (2) 5.1 Verification conditions (2) 5.2 Verification project (3) 5.3 Verification method (3) 5.4 Processing of verification results (5) 5.5 Verification cycle (5) Appendix A Preparation of reagents and solutions for verification (6) Appendix B Verification Record Format (Reference) (7) Appendix C Verification certificate page format (9) Appendix D Format of the verification result page (10) Appendix E Calibration (Temporary) Detection Method for Double Cathode Hollow Cathode Lamps (11) Appendix F Fluorescence Intensity Regulators (12) Atomic Fluorescence Photometer Calibration Procedure

1 Scope

This procedure is applicable to the non-dispersion principle atomic fluorescence spectrometer (hereinafter referred to as the instrument) using a hollow cathode lamp as a light source. First verification, follow-up verification and in-use inspection.

2 Overview

The instrument can be used to measure elements that are prone to form hydrides and to form gaseous components or to be easily reduced to atomic vapors. element. The instrument is irradiated with the characteristic radiation emitted by the light source on the atomic vapor of the element to be measured, and the ground state atom is excited. It is sent to a high-energy level, and when it is deactivated by radiation to return to the ground state, the principle of radiating fluorescence is used for quantitative analysis. The fluorescence intensity has the following relationship with the concentration of the element. If=ΦI0(1-e-KλLN) (1) Where. If---atomic fluorescence intensity; I0---the radiation intensity of the light source; Φ---Atomic Fluorescence Quantum Efficiency; L---absorption optical path; Kλ---the peak absorption coefficient at the wavelength λ; N---the number of ground state atoms per unit length. For a given element, when the wavelength and intensity of the source are fixed, the absorption path is fixed, and the atomization condition is one. Therefore, when the element concentration is low, the fluorescence intensity has a simple relationship with the mass concentration ρ of the fluorescent substance (α is a constant number). If=αρ The main structural block diagram of the instrument is shown in Figure 1. Figure 1 main structure block diagram The instrument can be divided into single channel, double channel, multi-channel and other types. ......

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