Detail of GB/T 40906-2021

Introduction of GB/T 40906-2021

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This standard was proposed by the China National Light Industry Council. This standard is under the jurisdiction of the National Technical Committee 480 on Furniture of Standardization Administration of China (SAC/TC 480). Methods for the determination of prohibited substances in furniture products and related materials - Certain phthalate esters WARNING — Persons using this document should be familiar with normal laboratory practice. This standard 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 the determination methods of six phthalate esters in furniture products and related materials by gas chromatography-mass spectrometry (GC-MS). This document, after being verified, may be referenced to for the determination of other phthalate esters. This document is applicable to the determination of six phthalate esters in furniture products and related materials. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 6682 Water for analytical laboratory use - Specification and test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 phthalates general name of esters generated by the reaction of phthalic acid and alcohol, whose chemical structure is characterized by two symmetric or asymmetric alkyl formate esters in the ortho positions of benzene ring Note: See Table 1 for the six phthalates described in this document.   4 Principle Phthalates in specimens are extracted with dichloromethane in Soxhlet extractor or ultrasonic generator, and the extract is determined by GC-MS after diluted to the scale. 5 Reagents or materials Water used shall meet the requirements for Grade 3 water as specified in GB/T 6682. 5.1 Dichloromethane Analytically or chromatographically pure. 5.2 Phthalate standard substance With purity not less than 95%; see Table 1. Table 1 Phthalates S.N. Chinese name English name (abbreviation) CAS No. Chemical structural formulaa Chemical formula 1 邻苯二甲酸二正丁酯 Di-n-butyl phthalate (DBP) 84-74-2 C16H22O4 2 邻苯二甲酸丁苄酯 Benzyl butyl phthalate (BBP) 85-68-7 C19H20O4 3 邻苯二甲酸二(2-乙基)己酯 Bis(2-ethylhexyl) phthalate (DEHP) 117-81-7 C24H38O4 4 邻苯二甲酸二正辛酯 Di-n-octyl phthalate (DNOP) 117-84-0 C24H38O4 5 邻苯二甲酸二异壬酯 Di-iso-nonyl phthalate (DINP) 28553-12-0b C26H42O4 68515-48-0c 6 邻苯二甲酸二异癸酯 Di-iso-decyl phthalate (DIDP) 26761-40-0d C28H46O4 68515-49-1e a The chemical structural formulae of DINP and DIDP are only one type of their isomers. b CAS No. of 28553-12-0 designates a mixture of isomers of di-iso-nonyl phthalate (DINP). c CAS No. of 68515-48-0 designates a mixture of phthalates, including three types of isomers: di-iso-octyl phthalate (DIOP), di-iso-nonyl phthalate (DINP), and di-iso-decyl phthalate (DIDP), of which the main component is DINP. d CAS No. of 26761-40-0 designates a mixture of isomers of di-iso-decyl phthalate (DIDP). e CAS No. of 68515-49-1 designates a mixture of phthalates, including three types of isomers: di-iso-nonyl phthalate (DINP), di-iso-decyl phthalate (DIDP) and di-iso-undecyl phthalate (DIUP), of which the main component of the mixture is DIDP. 5.3 Internal standard substance Benzyl benzoate (BB, CAS No.: 120-51-4) or diamyl phthalate (DAP, CAS No.: 131-18-0), with purity of not less than 95%. The specimen shall not contain the internal standard substance.

Contents of GB/T 40906-2021

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Principle 5 Reagents or materials 6 Apparatus 7 Sample 8 Test procedures 9 Test data processing 10 Precision Annex A (Informative) Characteristic ions and abundance ratio of six phthalates