SN/T 1979-2019 in English

VALID

Determination of praziquantel residue in foodstuffs of animal origin for export-LC-MS/MS method

Issued on:2019-10-25
Implemented on:2020-05-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $130.00
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Standard No:	SN/T 1979-2019
Document status:	VALID
Title in English:	Determination of praziquantel residue in foodstuffs of animal origin for export-LC-MS/MS method
Title in Chinese:	出口动物源食品中吡喹酮残留量的测定液相色谱-质谱/质谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-10-25
Implemented on:	2020-05-01
Superseding:	SN/T 1979-2007 Determination of praziquantel residue in food of animal origin for import and export-LC-MS/MS method
Professional Classification:	SN-Import&Export Inspection
Related Keywords:	version detection method liquid chromatography lc-ms/ms method detection limit export-lc-ms/ms method introduction standard background praziquantel residue matrices key term explanation praziquantel animal origin
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Introduction

Standard Background and Technological Evolution

SN/T 1979-2019 is a comprehensive revision of the 2007 version of the standard. The main technical changes include:

Technical Indicators	2007 version	2019 version
Detection Method	Liquid Chromatography	LC-MS/MS Method
Detection Limit	10μg/kg	5μg/kg
Scope of Application	6 Types of Matrices	Expanded to 8 types of matrices

Key term explanation

Praziquantel: CAS 55268-74-1, a broad-spectrum antiparasitic drug, purity requirement ≥98%.

LC-MS/MS: Liquid chromatography-tandem mass spectrometry technology, qualitative and quantitative analysis through parent ion/daughter ion pairs (313.2/203.4, 313.2/83.1).

Detailed explanation of the detection process

Sample pretreatment:

After homogenizing the sample, weigh 2g (accurate to 0.01g)
Add 10mL acetonitrile to extract, homogenize at 9500r/min for 30s
Centrifuge at 4000r/min for 5min, take the supernatant
Concentrate to dryness with nitrogen at 40℃

Instrument parameter setting

Parameter type	Requirement
Chromatographic column	C18 column (5μm,150mm×2.1mm)
Mobile phase	0.1% formic acid aqueous solution-acetonitrile (4:6)
Flow rate	0.3mL/min
Ion source	ESI positive ion mode

Implementation suggestions

1. The laboratory should regularly calibrate the sensitivity of the mass spectrometer to ensure stable MRM channel response

2. It is recommended to use the corresponding matrix matching standard curve for different matrix samples

3. When the test result is close to the judgment limit of 5μg/kg, the number of parallel measurements should be increased

More samples: YD/T 3934-2021 JGJ 94-2008 DL/T 5154-2012

Sample only — not a preview of SN/T 1979-2019

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