HOME Cart(2) Quotation About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

GB/T 30921.5-2016 English PDF

US$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 30921.5-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 5: Determination of acid number
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 30921.5-2016	English	119	Add to Cart	3 days [Need to translate]	Test method of purified terephthalic acid (PTA) for industrial use -- Part 5: Determination of acid number	Valid	GB/T 30921.5-2016

PDF similar to GB/T 30921.5-2016

Standard similar to GB/T 30921.5-2016

GB/T 40394 GB/T 37178 GB/T 32685 GB/T 30921.4 GB/T 30921.6 GB/T 30921.3

Basic data

Standard ID	GB/T 30921.5-2016 (GB/T30921.5-2016)
Description (Translated English)	Test method of purified terephthalic acid (PTA) for industrial use -- Part 5: Determination of acid number
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G16
Classification of International Standard	71.080.40
Word Count Estimation	6,617
Date of Issue	2016-06-14
Date of Implementation	2017-01-01
Quoted Standard	GB/T 601; GB/T 3723; 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 volumetric method for the determination of the acid value of industrial purified terephthalic acid (PTA). This standard is applicable to the determination of the acid value of industrial refined terephthalic acid (PTA).

GB/T 30921.5-2016: Test method of purified terephthalic acid (PTA) for industrial use -- Part 5: Determination of acid number

---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 5. Determination of acid number ICS 71.080.40 G16 National Standards of People's Republic of China Test method for industrial terephthalic acid (PTA) Part 5. determination of acid value Testmethodofpurifiedterephthalicacid (PTA) forindustrialuse- Part 5. Determination ofacidnumber 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 5 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. Shao Qiang, Ding Daxi, Shi Chunbao. Test method for industrial terephthalic acid (PTA) Part 5. determination of acid value 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 volumetric method for the determination of the acid value of industrial terephthalic acid (PTA). This part is applicable to the determination of acid value of 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 titration solution for GB/T 601 chemical reagents General rules for sampling safety of industrial chemical products GB/T 3723 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 terms and definitions

The following terms and definitions apply to this document. 3.1 Acid value The amount of alkali required to titrate 1 g of the PTA sample to the end point is in milligrams per gram (mg/g) based on the mass fraction of potassium hydroxide.

4 method summary

A certain amount of PTA sample dissolved in the appropriate amount of dimethyl sulfoxide, phenolphthalein as an indicator, with sodium hydroxide standard titration solution into Row titration. The acid value of the sample was calculated from the volume of the titration solution of the sodium hydroxide standard titration.

5 reagents and materials

5.1 Unless otherwise specified, the reagents used are of analytical grade and the test water is in accordance with the provisions of GB/T 6682. 5.2 sodium hydroxide standard titration solution. c (NaOH) = 0.5mol/L, according to GB/T 601 prepared. 5.3 phenolphthalein indicator (1g/L). Weigh 0.1g phenolphthalein, dissolved in ethanol, diluted with ethanol to 100mL. 5.4 dimethyl sulfoxide.

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 30921.5-2016_English be delivered?

Answer: Upon your order, we will start to translate GB/T 30921.5-2016_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 30921.5-2016_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 30921.5-2016_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.