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JJF 1448-2014 English PDF

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JJF 1448-2014: Calibration Specification for Superconducting Pulsed Fourier Transform Nuclear Magnetic Resonance Spectrometers
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1448-2014	English	369	Add to Cart	3 days [Need to translate]	Calibration Specification for Superconducting Pulsed Fourier Transform Nuclear Magnetic Resonance Spectrometers	Valid	JJF 1448-2014

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Basic data

Standard ID	JJF 1448-2014 (JJF1448-2014)
Description (Translated English)	Calibration Specification for Superconducting Pulsed Fourier Transform Nuclear Magnetic Resonance Spectrometers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A55
Classification of International Standard	17.220
Word Count Estimation	16,127
Date of Issue	2/14/2014
Date of Implementation	5/14/2014
Quoted Standard	ASTM E386-90-2011
Adopted Standard	ASTM E386-90(2011), NEQ
Regulation (derived from)	?AQSIQ Announcement 2014 No. 17
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This Standard applies to 300MHz and above the superconducting pulse Fourier transform NMR spectrometer (hereinafter referred to as the instrument) calibration.

JJF 1448-2014: Calibration Specification for Superconducting Pulsed Fourier Transform Nuclear Magnetic Resonance Spectrometers

---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.
Calibration Specification for Superconducting Pulsed Fourier Transform Nuclear Magnetic Resonance Spectrometers People's Republic of China National Metrology Technical Specifications Superconducting pulse Fourier transform NMR spectrometer Calibration Specification Issued on. 2014-02-14 2014-05-14 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Superconducting pulse Fourier transform NMR spectrometer calibration specifications ResonanceSp ectrometers 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 Drafters of this specification. Zhang Wei (China Institute of Metrology) Huang Ting (China Institute of Metrology) Dai Xinhua (China Institute of Metrology)

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 terminology and units of measurement (1) 3.1 Chemical shift (1) 3.2 free induction decay (FID) (1) Linewidth factor 3.3 (1) 4 Overview (1) 4.1 Principle (1) 4.2-instrument (2) 5 Metrological characteristics (2) Calibration Condition 6 (2) 6.1 laboratory environment (2) 6.2 Standard substance (2) 6.3 Experimental Condition (3) 7 calibration items and calibration methods (3) 7.1 1H spectral sensitivity (3) 7.2 13C spectral sensitivity (3) 7.3 1H spectral resolution (4) 7.4 13C Spectral Resolution (4) 7.5 1H line type (4) 7.6 13C line type (4) 7.7 1H spectrum quantitative reproducibility (4) 8 calibration results (4) 9 Recalibration interval (5) Appendix A calibration record format (6) Appendix B Calibration Certificate page format (7) Appendix C instrument parameters is recommended (8) Appendix D Evaluation of Uncertainty (9)

Introduction

Part of this specification with reference to the use of international instruments ASTME386-90 (2011) High-resolution nuclear magnetic resonance (NMR) Spectroscopic characterization implement data standards [StandardPracticeforDataPresentationRelatingtoHigh- ResolutionNuclearMagneticResonance (NMR) Spectroscopy]. This specification is the first release. Superconducting pulse Fourier transform NMR spectrometer Calibration Specification

1 Scope

This instruction applies to 300MHz and above the superconducting pulse Fourier transform NMR spectrometer (hereinafter referred to as equipment) Calibration. 2. References Characterization of the implementation of standards ASTME386-90 (2011) High-resolution nuclear magnetic resonance (NMR) spectroscopy data (StandardPracticeforDataPresentationRelatingtoHigh-ResolutionNuclearMagnetic Resonance (NMR) Spectroscopy) "Handbook of Analytical Chemistry --- Seventh Volume NMR Spectroscopy" Beijing. Chemical Industry Press For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments Version) applicable to this specification.

3 terminology and units of measurement

3.1 chemical shift chemicalshift Proton magnetic field in the same or other magnetic core, which because of its different chemical environment in the molecule, and in Phenomenon of resonance at different frequencies, and whose scale commonly used to measure the reference material and the sample resonance frequency difference list Shown, denoted δ, dimensionless 1. δ = νS-νR ν instrument × 10 6 (1) Where. νS --- the resonance frequency of the sample, Hz; νR --- the resonance frequency of the reference material, Hz; ν instruments --- instrument operating frequency, Hz. 3.2 free induction decay (FID) freeiductiondecay Spin system under pulsed accept induction coil signal occurs, its intensity over time and decay. 3.3 linewidth factor linebroadeningfactor For each data point free induction decay signal is exponential weighting factor used. When the factor is equal to Zero, not weighted.

4 Overview

4.1 Principle Nuclear magnetic resonance spectroscopy, the study has some moments of nuclei in a static magnetic field and the magnetic field due to the interaction of the magnetic moment Resonance is formed by a set of split levels, appropriate action under the RF frequency, energy level transitions occur between now and the emergence of

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