GB/T 38789-2020 in English

VALID

Oral care and cleansing products -- Determination of 10 elements in toothpastes -- Inductively coupled plasma mass spectrometry

Issued on:2020-04-28
Implemented on:2020-11-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	GB/T 38789-2020
Document status:	VALID
Title in English:	Oral care and cleansing products -- Determination of 10 elements in toothpastes -- Inductively coupled plasma mass spectrometry
Title in Chinese:	口腔清洁护理用品牙膏中10种元素含量的测定电感耦合等离子体质谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-04-28
Implemented on:	2020-11-01
ICS Classification:	71.100.40-Surface active agents
Chinese Classification:	Y43-Tooth paste, soap and detergent
Professional Classification:	GB-National Standard
Related Keywords:	plasma mass spectrometry introduction analysis plasma mass spectrometer medium mass number low mass number high mass number
Related Topics:	inductive coupling inductive coupling Inductively Coupled Plasma inductive plasma Element content Element content plasma mass spectrometry Inductively Coupled Plasma Mass Spectrometry Coupled inductor Inductive coupling+ plasma mass spectrometry Inductive coupling standard Inductively Coupled Mass Spectrometry Lithium icp plasma mass spectrometer Several ionizations in mass spectrometry icp plasma mass spectrometer plasma mass spectrometry meta spectrum Inductively Coupled Plasma Mass Spectrometry icp plasma mass spectrometer Deuterium content in water by mass spectrometry Coupled inductor Element mass spectrometry Element interference Inductive Plasma Mass Spectrometry Element interference Inductive coupling, etc. plasma mass spectrometer icp ms plasma mass spectrometry coupled plasma inductive plasma Inductively Coupled Plasma Mass Spectrometry plasma coupled mass spectrometer icp inductively coupled plasma mass spectrometer 9 ions in mass spectrometry element reserve mass spectrometer element toothpaste mercury Determination of 24 Elements in Soil by Inductively Coupled Plasma Mass Spectrometry Oral Care Toothpaste Ion content in mass spectrometry Inductive plasma mass spectrometer Determination method of certain element content in solid plasma inductively coupled mass spectrometry Inductance Mass Spectrometry Plasma Inductance Mass Spectrometry GBT38789 GB/T 38789-2020 Mass spectrometry cleaning ion source

《GB/T 38789-2020口腔清洁护理用品牙膏中10种元素含量的测定电感耦合等离子体质谱法》由TC492（全国口腔护理用品标准化技术委员会）归口，TC492SC1（全国口腔护理用品标准化技术委员会牙膏分会）执行，主管部门为中国轻工业联合会。

Introduction

Analysis of the core content of the standard

This standard adopts inductively coupled plasma mass spectrometer (ICP-MS) as the core detection equipment, and establishes a quantitative analysis method for 10 elements in toothpaste, including Ti, Cr, Mn, Fe, Cu, As, Se, Cd, Hg, and Pb.

Comparison of technical methods

Detection dimension	Traditional method	This standard method
Detection limit (mg/kg)	0.1-1.0	0.05-0.1
Simultaneous detection of multiple elements	Not supported	10 elements simultaneously
Interference elimination	Chemical separation	Collision reaction cell + mathematical correction

Key operating points

Microwave digestion procedure uses three-stage heating: 130℃(10min)→165℃(5min)→180℃(30min), and uses a nitric acid + hydrofluoric acid mixed system to ensure that the insoluble elements are completely dissolved.

Instrument parameter optimization requires special attention: RF power 1550W, helium flow 4-5mL/min, sampling depth 8-10mm, nickel/platinum cone requires regular maintenance.

Quality control requirements

Precision control regulations: In the concentration range of 0.1-100mg/kg, the repeatability limit (r) must meet the linear interpolation method requirements, and the relative standard deviation should be ≤5%.

The standard clearly requires the use of Sc/Ge/In/Rh/Re/Bi and other multi-element internal standard combinations. Elements in different mass ranges must match the corresponding internal standards:

Low mass number (Ti/Cr/Mn): 45Sc/72Ge
Medium mass number (As/Se/Cd): 103Rh/115In
High mass number (Hg/Pb): 185Re/209Bi

Implementation suggestions

1. Pretreatment optimization: For toothpaste containing silicates, it is recommended to increase the amount of hydrofluoric acid to 3mL, and the acid must be fully driven out after digestion

2. Interference correction: Pay special attention to the interference of 75As by 77Se. It is recommended to use the correction equation of 3.1278×[77]-1.0177×[78]

3. Equipment verification: New instruments must be verified by NIST SRM 1643e standard water samples, and the recovery rate should be controlled at 90-110%

More samples: DL/T 368-2010 JGJ 94-2008 GB 18306-2015

Sample only — not a preview of GB/T 38789-2020

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