GB/T 34704-2017 in English

VALID

Chemical reagent-General method for the determination of aldehyde

Issued on:2017-11-01
Implemented on:2018-05-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	GB/T 34704-2017
Document status:	VALID
Title in English:	Chemical reagent-General method for the determination of aldehyde
Title in Chinese:	化学试剂醛测定通用方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-11-01
Implemented on:	2018-05-01
ICS Classification:	71.040.30-Chemical reagents
Professional Classification:	GB-National Standard
Related Keywords:	chemical reagents detection method reagent-general method turbidimetric method applicable acid colorimetric method
Related Topics:	Determination method of acrolein aldehyde chemical fixative Chemical reagent detection General method for determination of chemical reagent aldehyde general chemical agent GB/T 34704-2017 Special chemical reagent Electrochemical window test method gbt 34704 2017 Chemical reagent quality General chemical reagent name General Chemical Reagents How to use cadmium reagent Method for Determination of Aldehyde Group Electrochemical window test method Chemical Reagent General Purpose Aldehydes Aldehyde method Determination method of aldehyde compounds Reagent usage method GBT34704 GB/T 34704-2017 Limulus reagent quantitative detection method Aldehyde and ketone reagents are suitable for Special reagents for ketones and aldehydes Linear optimization method for biochemical reagents Validity period and storage method of chemical reagents Chemical reagent preparation method website Structural chemistry determination methods Chemical force measurement How to store dried urine chemical reagents Methods for chemical identification of formaldehyde Formaldehyde detection method using phenol reagent method Safe use of chemical reagents Several methods of electrochemical testing Fixation reagents and methods Use of chemical reagents for engineering testing Method for detecting formaldehyde based on electrochemical principles Methods used to determine chemical structure Determination of rate constants by chemical methods Common methods for determining chemical structure

《GB/T 34704-2017化学试剂醛测定通用方法》由TC63（全国化学标准化技术委员会）归口，TC63SC3（全国化学标准化技术委员会化学试剂分会）执行，主管部门为中国石油和化学工业联合会。

Introduction

Interpretation of the National Standard of the People's Republic of China GB/T 34704-2017

Analysis of the background of standard formulation and technical evolution

GB/T 34704-2017 "General Method for Determination of Aldehyde in Chemical Reagents" is a national standard formulated on the basis of extensive research and practice, aiming to standardize the detection method of aldehyde content in chemical reagents. This standard combines advanced detection technologies at home and abroad, covering three classic methods: dimedone turbidimetry, chromotropic acid colorimetry and basic fuchsin-sulfite colorimetry, ensuring the accuracy and repeatability of the test results.

Comparison of standard frameworks

Determination method	Scope of application	Detection limit
Dimethedone turbidimetric method	Applicable to the determination of trace aldehydes in chemical reagents	0.5~4 μg/mL (in terms of HCHO)
Chromotropic acid colorimetric method	Applicable to the determination of trace aldehydes in chemical reagents	0.04~2 μg/mL (in terms of HCHO)
Basic fuchsin-sulfite colorimetric method	Applicable to the determination of trace aldehydes in chemical reagents, especially acetaldehyde detection	0.4~32 μg/mL (in CH₃CHO)

Method principle and operation flow

Dimethedone turbidimetric method: Aldehydes react with dimethedone to form insoluble colorless condensation products. When the aldehyde content is low, the condensation product is suspended and makes the solution turbid, which is determined by visual turbidimetry.

Chromotropic acid colorimetric method: In sulfuric acid medium, aldehydes react with chromotropic acid to form purple compounds, which can be determined by spectrophotometry or visual colorimetry.

Implementation Suggestions

Operational Specifications

Prepare reagents and test solutions in strict accordance with standard requirements to ensure that the experimental water meets the specifications of Grade 3 water in GB/T6682.
Select appropriate instruments and equipment according to the requirements of different detection methods. For example, the spectrophotometer should comply with the provisions of GB/T9721.

Quality Control

Calibrate instruments and equipment regularly to ensure measurement accuracy.
Establish a standard curve to verify the linear range and precision of the detection method.
Perform parallel sample measurements to evaluate the repeatability and reliability of the experimental results.

More samples: YD/T 3934-2021 NB/T 47013.2-2015 JGJ 94-2008

Sample only — not a preview of GB/T 34704-2017