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SN/T 3913-2014: Determination of terephthalic acid and ethylene glycol in polyethylene terephthalate ester(PET) and polyethylene terephthalate products - Gas chromatography-mass spectrometry(GC-MS) method
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SN/T 3913-2014	English	419	Add to Cart	3 days [Need to translate]	Determination of terephthalic acid and ethylene glycol in polyethylene terephthalate ester(PET) and polyethylene terephthalate products - Gas chromatography-mass spectrometry(GC-MS) method

SN/T 3913-2014: Determination of terephthalic acid and ethylene glycol in polyethylene terephthalate ester(PET) and polyethylene terephthalate products - Gas chromatography-mass spectrometry(GC-MS) method

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(Polyethylene terephthalate resin and molded product residual terephthalic acid and ethylene by gas chromatography - mass spectrometry) People's Republic of China Entry-Exit Inspection and Quarantine Standards Polyethylene terephthalate resin and molded article Determination of residues of terephthalic acid and ethylene glycol Gas chromatography - mass spectrometry terephthalateester (PET) andpolyethyleneterephthalateproducts- Gaschromatography-massspectrometry (GC-MS) method Issued on. 2014-04-09 2014-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted according to GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Jiangsu Entry-Exit Inspection and Quarantine Bureau, People's Republic of China Entry-Exit Inspection and Jiangyin Quarantine Bureau. The main drafters of this standard. Lixi Dong, Ding Hua, Zhouqiu Hong. Polyethylene terephthalate resin and molded article Determination of residues of terephthalic acid and ethylene glycol Gas chromatography - mass spectrometry

1 Scope

This standard specifies the gas chromatography - mass spectrometry polyethylene terephthalate resin and molded product residual terephthalic acid and ethylene A diol. This standard applies to polyethylene terephthalate resin molded product and determination of residual terephthalic acid and ethylene glycol. Terephthalic Acid in the range of 10mg/kg ~ 2500mg/kg, ethylene glycol detection range of 50mg/kg ~ 5000mg/kg.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 8170 repair value expressed about the rules and limit values and judgment GB/T 14189 fiber grade polyester chip (PET) GB/T 14190 fiber grade polyester chip (PET) Test Method GB 17931 bottle with polyethylene terephthalate (PET) resin

3 Determination of terephthalic acid

3.1 Method summary Sample ethanol water as solvent, was added tetramethylammonium hydroxide, by ultrasonic extraction, membrane extract was filtered and concentrated with N, N- dimethyl Carboxamide was transferred to a washing flask, ethyl iodide, then N, N- dimethylformamide volume. In suberic acid as an internal standard, using gas Chromatography - mass spectrometry were measured. 3.2 Reagents and materials Unless otherwise specified, all reagents were of analytical grade, double distilled water or water of equivalent purity. 3.2.1 ethanol. 3.2.2 aqueous ethanol (11). Measure 100mL ethanol (3.2.1) was mixed with 100mL of water. 3.2.3 terephthalic acid. Known, purity ≥99.5%. 3.2.4 suberic. purity ≥99.5%. 3.2.5 iodoethane. Purity ≥98%. 3.2.6 tetramethylammonium hydroxide. 25%. 3.2.7 N, N- dimethylformamide. 3.2.8 terephthalic acid standard stock solution. Weigh accurately 0.2g terephthalic acid (3.2.3) (accurate to 0.0001g) in 500mL container Flask, 25% of tetramethylammonium hydroxide (3.2.6) 5mL, diluted with water to the mark with ethanol (3.2.2). Then draw 25mL ...