SN/T 4692-2016 in English

VALID

Leather-Chemical tests-Determination of residual glycol ethers

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Implemented on:-
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Standard No:	SN/T 4692-2016
Document status:	VALID
Title in English:	Leather-Chemical tests-Determination of residual glycol ethers
Title in Chinese:
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Professional Classification:	SN-Import&Export Inspection
Related Keywords:	residual glycol ethers introduction technical background leather-chemical tests-determination select ion monitoring original qb/t series industry standards core detection parameters technical indicators gc-ei/ms gc-fid detection limit
Related Topics:	ether organic Organic chemical reagent detection solvent residual headspace residual solvent solvent organic ether ether solvent Organic solvent residue alcohol solvent Organic Electrochemistry Polyethylene glycol or related ether-glycol compounds alcohol solvent ether solvent Vapor Phase Residual Solvents Solvent residue sample Organic solvents secondary organic aerosol Organic reagent amount Ether solvent peak chemical organic reagent Organic Chemistry in My Eyes Determination of ethanol solvent solvent residual headspace Organic Residue Testing Gas phase solvent residue Organic reagent acceptance Acceptance of organic reagents leather solvent Gas phase solvent residue Organic experiment solvent Headspace Determination of Residual Solvents Ether solvent peak How to quantify organic aerosols cortisol measurement random Residual solvent recovery rate Butanediol is hemolytic Detection of ethanol residual solvents in the Pharmacopoeia Inspection methods for residual organic solvents Dichloroethylene solvent residue Solvent Residual Method Validation Qualitative and quantitative analysis of diethyl ether Anhydrous ethanol solvent residual amount Polyethylene glycol solvent residue Diethylene glycol monoethyl ether dissolved residue Ethylene glycol residue detection method Alcohol ethers Pharmacopoeia method for measuring ethanol residue content Ethanol solvent residue detection Ethanolamine residue detection Residual Solvent Acetic Acid Headspace Method Ethanol residue detection Organic chemical diethylene glycol detection Organic chemical solvent standards Dichloroethanol residue detection method Cortisol Chemical Measurement Method Chemical Identification Methods of Ethylene Glycol and Ether Preparation method of medical ethanol organic chemistry Pharmacopoeia Solvent Residues

Introduction

Technical background of the standard

This standard was issued in December 2016 and implemented in July 2017, replacing the original QB/T series industry standards. It uses gas chromatograph combined with mass spectrometer detector technology, and the detection sensitivity is increased to 0.1mg/kg.

Core Detection Parameters

Technical Indicators	GC-EI/MS	GC-FID
Detection Limit	0.1mg/kg	1.0mg/kg
Quantitative Range	0.1-5mg/L	1-20mg/L
Chromatographic Column	60m×0.25mm×0.25μm Weak Polar Column

Key Operational Points

Sample Pretreatment: Accurately weigh 1.0g of sample and add 25mL of methanol for ultrasonic extraction for 30 minutes. Filter through a 0.45μm filter and concentrate to volume. The extract should be concentrated to 2mL in a 40℃ water bath using nitrogen purging.

Instrumental Conditions: Use a programmed temperature ramp (60℃→245℃), an EI source at 70eV, and select ion monitoring (SIM) mode to select a characteristic ion pair, such as m/z 45/59/90 for EGDME.

Implementation recommendations

Standard solutions should be prepared and used immediately, and stored at 4°C in the dark for no more than 3 days
Blank tests and spike recovery tests (80%-120%) should be performed simultaneously for each batch of samples
It is recommended to regularly verify the mass spectrometry response factor with standards

More samples: JGJ 94-2008 QC/T 942-2021 GB 18306-2015

Sample only — not a preview of SN/T 4692-2016

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