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JJG 342-2014 English PDF

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JJG 342-2014: Gel Permeation Chromatographs
Status: Valid

JJG 342: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 342-2014	English	419	Add to Cart	3 days [Need to translate]	Gel Permeation Chromatographs	Valid	JJG 342-2014
JJG 342-1993	English	399	Add to Cart	3 days [Need to translate]	Verification Regulation of Gel Chromatograph	Obsolete	JJG 342-1993

PDF similar to JJG 342-2014

Standard similar to JJG 342-2014

JJG 178 JJG 245 JJG 810 JJG 452 JJG 512 JJG 211

Basic data

Standard ID	JJG 342-2014 (JJG342-2014)
Description (Translated English)	Gel Permeation Chromatographs
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A60
Classification of International Standard	17.180
Word Count Estimation	18,142
Date of Issue	2/14/2014
Date of Implementation	8/14/2014
Older Standard (superseded by this standard)	JJG 342-1993
Regulation (derived from)	AQSIQ Announcement No. 17 of 2014
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This Standard specifies the weight average molecular weight measurement range of 1 kg/mol-1Mg/mol gel chromatograph initial verification, verification and subsequent use of checks.

JJG 342-2014: Gel Permeation Chromatographs

---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.
Gel Permeation Chromatographs State verification procedures People's Republic of China Gel chromatography Issued on. 2014-02-14 2014-08-14 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Gel chromatography test procedures hs Replacing JJG 342-1993 Focal point. the National Technical Committee stoichiometric physical Drafting units. China Institute of Metrology This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation The drafters of the regulations. Qi Xin (China Institute of Metrology) Repair Hongyu (China Institute of Metrology) High Huifang (China Institute of Metrology)

Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 metering performance requirements (1) 4 General Requirements (2) 4.1 Appearance (2) 4.2 boot check (2) 5 control of measuring instruments (2) 5.1 verification Conditions (2) 5.2 test equipment and certified reference materials (2) 5.3 test items and test methods (2) 5.4 Verification Results Processing (5) 5.5 test cycle (5) Appendix A calibration curve of the instrument calibration method (6) B number of theoretical plates (column efficiency) calibration method Appendix (7) Appendix C gel chromatography test recording format (8) Appendix D calibration certificate/test results in the notice page format (10)

Introduction

This procedure compared with JJG 342-1993, in addition to editorial changes, the major technical changes are as follows. --- Pump flow stability test point by the "1mL/min" is changed to "0.5mL/min", measurement of performance indicators The original rules of the "better than ± 1%" is changed to "not more than 1.0%." --- Increasing the laser light scattering detectors, viscosity detectors baseline noise and baseline drift test. --- Instrument measuring the maximum permissible error of the flow into the organic phase and the aqueous mobile phase two kinds. When the organic mobile phase, instrumentation Measure the maximum permissible error of measurement of performance of the original regulations "± 20%" is changed to "± 10%"; aqueous mobile phase The instrument measuring the maximum permissible error of measurement of performance indicators "± 25%". --- The "calibration instrument calibration curve" moved to Appendix A. --- The "number of theoretical plates (column efficiency) calibration method" moved to Appendix B. The previous versions of the release JJG 342 case. --- JJG 342-1993. Gel chromatography test procedures

1 Scope

The order applies to weight average molecular weight measurement range of 1kg/mol ~ 1Mg/mol gel chromatograph first seizure Set, and use the subsequent verification check.

2 Overview

Gel chromatography (hereinafter referred to as the instrument) is a size exclusion HPLC method, when equipped with a polymer solution through multiple After the column packing material hole, polymer sample size descending order molecules are separated by detecting Detects a signal sample. Gel chromatography to measure the molecular weight of the polymer a relative measurement method. The sample The molecular weight and molecular weight distribution spectrum by the instrument and the calibration curve obtained. The molecular weight distribution with a polydispersity index Characterization. Instrument usually consists of a solvent tank, solvent pump system, injector, column, detector (differential detector necessary), Part of the waste liquid recovery unit, a data processing system.

3 metering performance requirements

Measurement performance of the instrument shall meet the requirements of the indicators in Table 1. Table 1 metrological requirements No. test items measured performance indicators 1 oven temperature stability of not more than 1.0 ℃ 2 pump flow stability is not more than 1.0%

3 detector baseline noise

Differential detector is less than 0.1% FS UV detector is less than 1.0% FS Laser light scattering detector is less than 0.3% FS Viscosity detector is less than 0.05% FS

4 detector baseline drift

Differential detector is less than 1.0% FS · h-1 UV detector is less than 4.0% FS · h-1 Laser light scattering detector is less than 1.0% FS · h-1 Viscosity detector is less than 0.1% FS · h-1

5 instrument measures the maximum permissible error

When the organic mobile phase, ± 10.0% When aqueous mobile phase, ± 25% 6 instrument measurement repeatability does not exceed 5.0%

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