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GB/T 30921.7-2016 English PDF

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GB/T 30921.7-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 7: Determination of b* value -- Color difference meter
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 30921.7-2016	English	119	Add to Cart	3 days [Need to translate]	Test method of purified terephthalic acid (PTA) for industrial use -- Part 7: Determination of b value -- Color difference meter*	Valid	GB/T 30921.7-2016

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Basic data

Standard ID	GB/T 30921.7-2016 (GB/T30921.7-2016)
Description (Translated English)	Test method of purified terephthalic acid (PTA) for industrial use -- Part 7: Determination of b* value -- Color difference meter
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G16
Classification of International Standard	71.080.40
Word Count Estimation	6,659
Date of Issue	2016-06-14
Date of Implementation	2017-01-01
Quoted Standard	GB/T 3723; GB/T 6679; 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 a color difference meter method for the determination of b value of industrial refined terephthalic acid (PTA). This standard is applicable to the determination of the b value of industrial refined terephthalic acid (PTA).

GB/T 30921.7-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 7: Determination of b* value -- Color difference meter

---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.
Test method of purified terephthalic acid (PTA) for industrial use - Part 7. Determination of b * value - Color difference meter ICS 71.080.40 G16 National Standards of People's Republic of China Test method for industrial terephthalic acid (PTA) Part 7. Determination of b * values - Chromatic aberration method Testmethodofpurifiedterephthalicacid (PTA) forindustrialuse- Part 7. Determination ofb * value-Colordifferencemeter 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 7 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. China Petrochemical Yizheng Chemical Fiber Co., Ltd. This part of the main drafters. Zhao Fu Ping, Wang Qing, Sun Zhendong, Army. Test method for industrial terephthalic acid (PTA) Part 7. Determination of b * values - Chromatic aberration method

1 Scope

This part of GB/T 30921 specifies the colorimeter method for the determination of b * values for industrial terephthalic acid (PTA). This part is applicable to the determination of b * values for 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. General rules for sampling safety of industrial chemical products GB/T 3723 General rules for sampling of solid chemical products GB/T Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170

3 terms and definitions

The following terms and definitions apply to this document. 3.1 PTAb * value PTAb * value PTA product optical quality characterization, that is, the degree of yellow color of PTA products to the provisions of the International Commission on Illumination in 1976 In the non-self-illuminating color space (ie CIE1976L * a * b *) in the b * value.

4 method summary

The PTA powder sample is pressed into a sheet, and the optical geometrical condition of the colorimeter is 45/0 or 0/45, the spectral range is 400 nm to 700 nm Source exposure, the determination of b * value.

5 instruments and equipment

5.1 colorimeter. spectral range of 400nm ~ 700nm, optical geometric conditions 45/0 or 0/45, with D65 light source, 10 ° angle, the appropriate Measuring the aperture. The standard black and white board of the instrument shall be periodically calibrated. 5.2 tabletting machine. can be applied to the pressure to 30MPa ~ 45MPa, and with the measurement of the aperture to match the sample cup, the mold (surface to be clean mark). see picture 1.

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