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JJG 342: Historical versions
| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| JJG 342-2014 | English | 419 |
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Gel Permeation Chromatographs
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| JJG 342-1993 | English | 399 |
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Verification Regulation of Gel Chromatograph
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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 | 18,140 |
| 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| Older Standard (superseded by this standard) | JJG 342-1993 |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)
table of Contents
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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