YS/T 1658.5-2023Methods for chemical analysis of crude nickel cobalt hydroxide - Part 5: Determination of moisture content - Gravimetric method (English PDF)
粗氢氧化镍钴化学分析方法 第5部分：水分含量的测定 重量法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
December 29, 2023
Implementation date
July 1, 2024
Scope
YS/T 1658.5-2023 is the English-translated version of 粗氢氧化镍钴化学分析方法 第5部分：水分含量的测定 重量法.
YS/T 1658.5-2023 gives a gravimetric method for the moisture content of crude nickel cobalt hydroxide, over the range 5.00 % to 70.00 %. The intermediate is shipped as a wet cake and its metal content is reported on a dry basis, so the moisture figure decides how much nickel and cobalt a lot actually contains. A large test portion of 1,000 g to 1,500 g is spread on a tray and dried at 105 °C plus or minus 2 °C, first for 48 h and then in 4 h steps, weighed hot each time until constant mass; three determinations are made in parallel. The document specifies the balance, drying oven and tray, the sample, the procedure, the calculation, the precision - with the interlaboratory data in Annex A - and the test report. Issued by MIIT on 29 December 2023, it has applied since 1 July 2024.
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Document preview — YS/T 1658.5-2023
National Standard of the People's Republic of China
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Apparatus
- 6 Samples
- 7 Test procedures
- 8 Test data processing
- 9 Precision
- 10 Test report
- Annex A (informative) Original data of the precision test
Foreword
This document was issued on 29 December 2023 by the Ministry of Industry and Information Technology of the People's Republic of China, and has applied since 1 July 2024.
It is a YS/T standard: a recommended industry standard of China's non-ferrous metals industry.
Introduction
YS/T 1658, Methods for chemical analysis of crude nickel cobalt hydroxide, consists of seven parts: Part 1, nickel content by the dimethylglyoxime gravimetric method; Part 2, chromium, phosphorus and manganese contents by inductively coupled plasma atomic emission spectrometry; Part 3, fluorine content by the ion selective electrode method; Part 4, copper, aluminium, lithium, zinc, cadmium, lead and arsenic contents by inductively coupled plasma atomic emission spectrometry; Part 5, moisture content by the gravimetric method; Part 6, insoluble substance in hydrochloric acid by the gravimetric method; Part 7, manganese content by potentiometric titration.
1 Scope
This document describes the method for the determination of moisture content in crude nickel cobalt hydroxide.
This document is applicable to the determination of moisture content in crude nickel cobalt hydroxide. The determination range is 5.00%–70.00%.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
YS/T 1460-2021 Crude nickel cobalt hydroxide
3 Terms and definitions
No terms and definitions are defined in this document.
4 Principle
A certain amount of the test portion is placed in a drying oven and dried at 105°C±2°C to constant mass. The loss in mass is determined, and the moisture content is calculated.
5 Apparatus
5.1 Electronic balance: With a measuring range not less than 2,000 g, and an accuracy of 0.1 g or better.
5.2 Electric thermostatic drying oven: Capable of controlling the temperature at 105°C±2°C.
5.3 Sample tray: A clean stainless-steel or enamel tray with a smooth surface (common specifications: bottom area approximately 600 cm² and depth approximately 3 cm).
6 Samples
Samples shall be taken and prepared in accordance with the requirements of YS/T 1460-2021, 7.4.
7 Test procedures
7.1 Test portion
Weigh 1,000 g–1,500 g of the sample (6), accurate to 0.1 g.
7.2 Parallel tests
Carry out three tests in parallel.
7.3 Determination
7.3.1 Promptly spread the test portion (7.1) evenly in the sample tray previously dried to constant mass (m1), and record the total mass of the sample tray and the test portion (m2).
7.3.2 Place the sample tray containing the test portion in the electric thermostatic drying oven (5.2) at 105°C±2°C and dry the test portion for 48 h.
7.3.3 Remove the sample tray from the oven and, while the tray and the test portion are still hot, weigh them using the electronic balance (5.1). Return the sample tray containing the test portion to the electric thermostatic drying oven (5.2) maintained at 105°C±2°C and dry for a further 4 h. Remove the sample tray from the oven and, while the tray and the test portion are still hot, weigh them again using the electronic balance (5.1). Repeat the operations until constant mass is reached, and record the total mass of the sample tray and the test portion (m3). Heat-insulating material, such as foam or cardboard, should be placed under the electronic balance.
Remaining clauses in the full document
- 8 Test data processing
- 9 Precision
- 10 Test report
- A Annex A (informative) Original data of the precision test
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 10 pages — is available in the English PDF.
Referenced standards
Normative references
YS/T 1460-2021 Crude nickel cobalt hydroxide
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Related Standards
YS/T 1658.1-2023 — Methods for chemical analysis of crude nickel cobalt hydroxide - Part 1: Determination of nickel content - Dimethylglyoxime gravimetric method
YS/T 1658.2-2023 — Methods for chemical analysis of crude nickel cobalt hydroxide - Part 2: Determination of chromium, phosphorus and manganese contents - Inductively coupled plasma atomic emission spectrometry
YS/T 1658.3-2023 — Methods for chemical analysis of crude nickel cobalt hydroxide - Part 3: Determination of fluorine content - Ion selective electrode method
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