GB/T 6702-2022 in English

VALID

Naphthalene sulphuric acid test

Issued on:2022-07-11
Implemented on:2022-11-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	GB/T 6702-2022
Document status:	VALID
Title in English:	Naphthalene sulphuric acid test
Title in Chinese:	萘酸洗比色试验方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-07-11
Implemented on:	2022-11-01
Superseding:	GB/T 6702-2000 Naphthalene sulphuric acid test
ICS Classification:	71.080-Organic chemicals
Professional Classification:	GB-National Standard
Related Keywords:	test principles sulfuric acid temperature control accuracy naphthalene samples constant temperature water bath
Related Topics:	Separation method of benzene and naphthalene How to use micro cuvette Colorimetric film test Microplate Colorimetric Test Naphthalene ring analysis method Zolbichrome aluminum Colorimetric film test naphthalene hplc method Second-stream colorimetry naphthalene hplc method Naphthalene liquid detection method Colorimetric tube Bina test China Bina color card colorimetry Colorimetry Analytical method for naphthalene Wash and test pickling total acid method than x Colorimeter standard colorimetric solution Comparative test evaluation method Naphthalene+ Test Results Reference method Naphthaleneacetic acid analysis method naphthalene reagent method Octafluoronaphthalene detection method Colorimetric Colorimetric method Calcium colorimetry Griess reagent colorimetric method cuvette colorimeter pickling Colorimeters and Cuvettes colorimetric gelatin Colorimeters and Cuvettes Colorimetric solution Indium colorimetry Naphthalene monitoring method Acid wash colorimetric Analysis method of octafluoronaphthalene How to use colorimetry Color column method Naphthalene specifications and testing methods Naphthalene Test for Moisture naphthalene for calibration Colorimeter cuvette Naphthalene and mixed acids Naphthic acid analysis method cuvette colorimeter Tetrazolium salt colorimetric test Pickling colorimetric test Colorimetric experiment Colorimetric Arsenic Method pickling method red than blue GBT6702 GB/T 6702-2000 GB/T 6702-2022 How to prepare cuvette cleaning solution How to use cuvettes How to use colorimeter cod test colorimetry Colorimetric cod determination method Column flushing methods Compatibility test method for cuvettes Test methods for complete sets of cuvettes Laboratory cuvette cleaning methods Naphthalene test method Titanium sulfate colorimetry Pickling acceptance Colorimetric cup heat dissipation method Formic acid determination method colorimetric method Colorimetric determination method of amino acids Colorimetric method validation Chromatographic method for detecting naphthalene Nitrate colorimetric method Naphthalene column efficiency measurement method How to clean colorimetric tubes How to flush a column How to verify the method of colorimetry How to do method verification for colorimetry Column flushing method Comparison of acetic acid production methods Nucleic acid color development method Aromatic acid wash colorimetry Octafluoronaphthalene test method Test methods for cuvette matching How to shake the colorimetric tube Reference and candidate methods Octafluoronaphthalene gas method Advantages of colorimetric methods Standard colorimetric tube Reference method candidate method Acid wash colorimetric analysis Aromatic acid wash colorimetric analysis Synthesis method of naphthalene

《GB/T 6702-2022萘酸洗比色试验方法》由TC469（全国煤化工标准化技术委员会）归口，TC469SC3（全国煤化工标准化技术委员会炼焦化学分会）执行，主管部门为国家标准化管理委员会。

Introduction

Analysis of key points of standard framework upgrade

Comparison dimensions	2000 version	2022 version	Change description
Instrument precision	Balance sensitivity 0.1g	ME204E balanceSensitivity 0.0001g	Detection accuracy improved by two orders of magnitude
Reagent control requirements	Basic chemicals	Requirements for adding high-grade pure sulfuric acid	Purity assurance pyramid improvement
Safety Control	General Laboratory Specifications	New Warning Clauses (Chapter 4)	Strengthen HSE Management System

Technical Interpretation of Test Principles

Based on the sulfonation reaction of sulfuric acid on naphthalene samples at a specific temperature, the Co-Fe-Cu three-color stock solution system (ratio scheme see Table 1) matched with standard colorimetric tubes is used to achieve turbidity-color dual quality control. The key technological breakthroughs are:

optical path uniformity guarantee of φ26mm flat-bottom colorimetric tube
precise control curve of water absorption of sulfuric acid (superior purity)
precise constant temperature guarantee of water bath device±1℃

Laboratory Implementation Optimization Suggestions

Case: Equipment Upgrade Plan of a Testing Agency

Equipped with XPE205DR analytical balance (accuracy 0.01mg), F306Pro experimental-grade constant temperature water bath (temperature control accuracy 0.1℃), and the qualified rate of delivery verification of the colorimetric tube set meets the technical requirements.

More samples: NB/T 47013.2-2015 GB 18306-2015 GB 50021-2001(2009)

Sample only — not a preview of GB/T 6702-2022

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