GB/T 30921.4-2016 English PDF

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GB/T 30921.4-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 4: Determination of titanium content -- Diantipyrylmethane photometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 30921.4-2016	119	Add to Cart	3 days	Test method of purified terephthalic acid (PTA) for industrial use -- Part 4: Determination of titanium content -- Diantipyrylmethane photometric method	Valid

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Basic data

Standard ID: GB/T 30921.4-2016 (GB/T30921.4-2016)
Description (Translated English): Test method of purified terephthalic acid (PTA) for industrial use -- Part 4: Determination of titanium content -- Diantipyrylmethane photometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G16
Classification of International Standard: 71.080.40
Word Count Estimation: 6,697
Date of Issue: 2016-06-14
Date of Implementation: 2017-01-01
Quoted Standard: GB/T 602-2002; GB/T 6679; GB/T 6682; GB/T 8170
Regulation (derived from): National Standard Announcement No. 8 of 2016
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 spectrophotometric method for the determination of titanium in industrial fine terephthalic acid (PTA). This standard is applicable to the determination of titanium in industrial grade terephthalic acid (PTA) with a titanium content of not less than 0.020 mg/kg.

GB/T 30921.4-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 4: Determination of titanium content -- Diantipyrylmethane photometric method

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Test method of purification terephthalic acid (PTA) for industrial use - Part 4. Determination of titanium content - Diantipyrylmethane photometric method ICS 71.080.40 G16 National Standards of People's Republic of China Test method for industrial terephthalic acid (PTA) Part 4. determination of titanium content Diantipyrylmethane spectrophotometric method Testmethodofpurifiedterephthalicacid (PTA) for industrialuse-Part 4. Determinationoftitaniumcontent- 2016-06-14 release 2017-01-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

GB/T 30921 "Industrial terephthalic acid (PTA) test method" is divided into the following parts. - Part 1. Determination of p-carboxybenzaldehyde (4-CBA) and p-methylbenzoic acid (p-TOL) - Part 2. Determination of metal content; - Part 3. Determination of water content; - Part 4. Determination of titanium content - Diantipyrylmethane spectrophotometric method; - Part 5. Determination of acid value; - Part 6. Determination of particle size distribution; - Part 7. Determination of b * values - Chromatic aberration method. This part is part 4 of GB/T 30921. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed by China Petroleum & Chemical Corporation. This section is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63). This part of the drafting unit. Sinopec Yangzi Petrochemical Co., Ltd. This part of the main drafters. Xu Hong, Qian Yanhu. Test method for industrial terephthalic acid (PTA) Part 4. determination of titanium content Diantipyrylmethane spectrophotometric method WARNING. This standard does not address all safety issues related to its use. It is the user's responsibility to take appropriate safety and health measures, And to ensure compliance with relevant national regulations.

1 Scope

This part of GB/T 30921 specifies the spectrophotometric method for the determination of titanium content in industrial terephthalic acid (PTA). This part is applicable to the determination of titanium content of not less than 0.020mg/kg in industrial terephthalic acid (PTA).

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. Preparation of standard solutions for the determination of impurities in chemical reagents GB/T 602-2002 General rules for sampling of solid chemical products GB/T GB/T 6682 Analytical laboratory water specifications and test methods Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170

3 method summary

Under the conditions specified in this section, the PTA sample is treated ashes and the ash is dissolved in the sulfuric acid solution. In the hydrochloric acid medium, (DAM) to form a yellow complex, measured at the wavelength of 420nm absorbance, the concentration of titanium in the sample, According to the standard curve.

4 Reagents and Materials

4.1 Unless otherwise specified, all reagents are of analytical grade and the test water complies with the provisions of GB/T 6682. 4.2 sulfuric acid solution. 1 1, with excellent grade pure sulfuric acid preparation. 4.3 hydrochloric acid. excellent grade pure. 4.4 ascorbic acid solution (30g/L). Weigh 30g ascorbic acid, dissolved in 1L water, shake. 4.5 Diantipyrylmethane (DAM) solution (50g/L). Weigh 50gDAM, dissolved in 1L hydrochloric acid solution [c (HCl) = 1mol/L] Shake well. 4.6 Titanium standard stock solution (1.0mg/mL) can be prepared according to GB/T 602-2002 in Table 1, No. 51, or commercially available. 4.7 Titanium standard solution (0.001mg/mL). absorb titanium standard stock solution (4.6) 1.0mL in 1000mL volumetric flask, 1% (volume Fraction) of the hydrochloric acid solution was diluted to the mark. The solution is prepared before use. ......

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