Standard No.:	GB/T 1677-2008
English Name:	Determinating the epoxy value of plasticizers
Chinese Name:	增塑剂环氧值的测定
Chinese Classification:	C70    Industrial dust and gas prevention technology
Professional Classification:	GB    National Standard
ICS Classification:	71.100.40 71.100.40    Surface active agents 83.040.30    Auxiliary materials and additives for plastics 71.100.40
Source Content Issued by:	AQSIQ; SAC
Issued on:	2008-6-18
Implemented on:	2009-2-1
Status:	superseded
Superseded by:	GB/T 1677-2023 Determinating the epoxy value of plasticizers
Superseded on:	2024-7-1
Superseding:	GB/T 1678-1981 Determination of the epoxy value of plasticizers(pyridine-hydrochloride method) GB/T 1677-1981 Determination of the epoxy value of plasticizers(acetone-hydrochloride method)
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	80.0
Delivery:	via email in 1 business day

Determinating the epoxy value of plasticizers 1 Scope Method A of this standard is applicable to the determination of epoxy value of epoxy plasticizer, and method B is applicable to the determination of epoxy value of epoxy plasticizer which does not completely react with acetone-hydrochloride solution at room temperature. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding correction of error) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this national standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies. GB/T 601 Chemical reagent - Preparations of reference titration solutions GB/T 603 Chemical reagent Preparations of reagent solutions for use in test methods(GB/T 603-2002, ISO 6353-1: 1982, NEQ) GB/T 6682 Water for analytical laboratory use-Specification and test methods(GB/T 6682-2008, ISO 3696, 1987, MOD) 3 Terms and definitions For the purpose of this standard, the following terms and definitions apply. 3.1 epoxy value the oxygen content in the ethylene oxide group in every 100 g sample. 4 Reagents and solutions Unless otherwise stated, only three-level water in GB/T 6682 or equivalent purity shall be used in the analysis. Unless otherwise specified, he standard titration solutions, preparations and products used in the analysis shall be prepared according to GB/T 601 and GB/T 603. 4.1 Hydrochloric acid [7647-01-0]. 4.2 Acetone [67-64-1]. 4.3 Pyridine [110-86-1]. 4.4 95% ethanol [64-17-5]. 4.5 pyridine hydrochloride solution: Take 16 mL hydrochloric acid and 984 mL pyridine, mix well and seal for later use. 4.6 acetone-hydrochloride solution: The volume ratio of hydrochloric acid and acetone is 1:40, and it is stored in a glass bottle for standby.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Reagents and solutions 5 Instruments 6 Analysis Steps 7 Result calculation 8 Admissible error