Standard No.:	GB/T 41435-2022
English Name:	Determination of boric acid and salts of boric acid in toy materials —Inductively coupled plasma mass spectrometry
Chinese Name:	玩具材料中硼酸和硼酸盐含量的测定 电感耦合等离子体质谱法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2022-4-15
Implemented on:	2022-4-15
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	8500 words
Translation Price(USD):	255.0
Delivery:	via email in 1~3 business day

Determination of boric acid and salts of boric acid in toy materials - Inductively coupled plasma mass spectrometry WARNING - Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This document describes an inductively coupled plasma mass spectrometry for the determination of boric acid and salts of boric acid in toy materials. This document is applicable to the determination of boron in toy materials, and the results are counted by boric acid and salts of boric acid. 2 Normative references The following documents contain requirements which, through reference in this text, constitute indispensable requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 602 Chemical reagent - Preparations of standard solutions for impurity GB 6675.2 Safety of toys - Part 2: Mechanical and physical properties GB 6675.4-2014 Safety of toys - Part 4: Migration of certain elements GB/T 6682 Water for analytical laboratory use - Specification and test methods 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 base material material upon which coatings may be formed or deposited 3.2 coating all layers of material formed or deposited on the base material of a toy Note: It includes paints, varnishes, lacquers, inks, polymers, or other substances of a similar nature, whether they contain metallic particles or not, no matter how they have been applied to the toy, and which may be removed by scraping with a sharp blade 3.3 mass-coloured materials materials that absorb coloring substances but do not form a coating Note: Such as wood, fiberboard, cardboard, leather, bones and other loose materials. 3.4 paper and paperboard paper and paperboard with maximum mass per unit area not greater than 400 g/m2 Note: Paper and paperboard (possibly, fiberboard or cardboard) with the mass per unit area exceeding 400 g/m2 shall be treated as "other mass-coloured materials". 3.5 scraping mechanical process for removal of coatings down to the base material Note: Scraping shall not be performed on the base material. 3.6 toy material all accessible materials on toys 4 Principle Boric acid and salts of boric acid in toy materials are extracted with hydrochloric acid of specific concentration under specific conditions. After filtration, boron in the sample solution is determined with an inductively coupled plasma mass spectrometer (ICP-MS) and quantified with internal standard method. The content of boric acid and salts of boric acid is calculated based on boron content.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Reagents and materials 6 Apparatus 7 Analysis procedure 8 Result calculation 9 Lower limit of quantitation, recovery rate and precision 10 Test report Annex A (Informative) Reference working conditions for inductively coupled plasma mass spectrometer Annex B (Informative) Precision Bibliography