GB/T 32462-2015 English PDF

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GB/T 32462-2015: Determination of the migration of antimony in polyester resin and products -- Atomic fluorescence spectrophotometer
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 32462-2015	239	Add to Cart	3 days	Determination of the migration of antimony in polyester resin and products -- Atomic fluorescence spectrophotometer	Valid

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Basic data

Standard ID: GB/T 32462-2015 (GB/T32462-2015)
Description (Translated English): Determination of the migration of antimony in polyester resin and products -- Atomic fluorescence spectrophotometer
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G32
Classification of International Standard: 83.140.01
Word Count Estimation: 11,142
Date of Issue: 2015-12-31
Date of Implementation: 2016-07-01
Quoted Standard: GB/T 5009.156; GB/T 6682
Regulation (derived from): State Standard Announcement 2015 No.43
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the method for the determination of antimony migration in polyester (polyethylene terephthalate) resin and its molded articles by atomic fluorescence spectrometry. This standard applies to thermoplastic polyester (polyethylene terephthalate) resin and its products in the determination of antimony migration.

GB/T 32462-2015: Determination of the migration of antimony in polyester resin and products -- Atomic fluorescence spectrophotometer

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of the migration of antimony in polyester resin and products - Atomic fluorescence spectrophotometer ICS 83.140.01 G32 National Standards of People's Republic of China Determination of antimony transport in polyester resin and its molded articles Atomic fluorescence spectrophotometry 2015-12-31 released 2016-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III 1 Scope 1 2 normative reference document 1 Principle 1 4 Reagent 1 5 instrument 2 6 Instrument Condition 2 7 Analysis Step 2 Calculation and presentation of results 3 9 detection limit 4 10 precision 4

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and centralized by the National Standardization Technical Committee for Quality Assurance (SAC/TC374). The main drafting unit of this standard. National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Guangzhou Quality Supervision and Inspection Research Institute, Guangzhou letter Lianzhi Tong Industrial Co., Ltd. The main drafters of this standard. Xi Shaofeng, Xie Yongping, Li Huiyong, Xie Wenjie, Wang Jicai, Lai Hongjuan, Zhang Kedong, Tan Jianhua, Huang Jinchao, Zhang Husong, Zhao Tiantian, Huang Yining, Gong Yongquan. Determination of antimony transport in polyester resin and its molded articles Atomic fluorescence spectrophotometry

1 Scope

This standard specifies the use of atomic fluorescence spectrophotometric determination of polyester (polyethylene terephthalate) resin and its molybdenum migration Methods. This standard applies to the determination of the amount of antimony in the thermoplastic polyester (polyethylene terephthalate) resin and its molded articles.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. General rules for immersion test of packaging materials and their products for foodstuffs GB/T 5009.156 GB/T 6682 Analytical laboratory water specifications and test methods

3 principle

Sb5 in the sample soaking solution is pre-reduced to Sb3 by thiourea-ascorbic acid mixed solution and then treated in a hydride generator by potassium borohydride And the conversion of antimony was determined by atomic fluorescence spectrometry.

4 reagent

Unless otherwise stated, the reagents used are analytical grade and water is the tertiary water specified in GB/T 6682. 4.1 hydrochloric acid solution (1 49). excellent grade pure. 4.2 Sodium hydroxide. 4.3 Potassium borohydride. 4.4 potassium borohydride solution. first weighed 0.5g sodium hydroxide (see 4.2) in a small amount of ionized water, to be completely dissolved and then add 1.0g borohydride Potassium (see 4.3), dissolved to 100mL. Now with the current use. 4.5 thiourea. 4.6 ascorbic acid. 4.7 thiourea - ascorbic acid solution. 5g thiourea (see 4.5), 5g ascorbic acid (see 4.6), dissolved in water to 100mL, Now with the current use. 4.8 acetic acid (glacial acetic acid). 4.9 Acetic acid solution (4%). Take 4mL acetic acid (see 4.8) Add 50mL of water and dilute to 100mL with water. 4.10 Antimony powder (purity 99.99%). 4.11 sulfuric acid, ρ≈1.84g/mL. 4.12 Antimony Standard stock solution. accurately weighed 0.5000g antimony powder (see 4.10), wet with a small amount of water, add 25mL sulfuric acid (see 4.11), slow Slowly heated to dissolve, the solution quantitative transfer to about 500mL water filled with 1000mL volumetric flask, diluted with water to the mark, mixed uniform. This stock solution is equivalent to 0.5 mg antimony per milliliter. ......

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