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GB/T 6730.35-2016 English PDF

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Q: Should I purchase the latest version GB/T 6730.35-2016?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6730.35-2016 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 6730.35-2016: Iron ores -- Determination of copper content -- Oxalic acid bis-cyclohexylidene hydragide (cuprizone) spectrophotometric method
Status: Valid

GB/T 6730.35: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.35-2016	199	Add to Cart	3 days	Iron ores -- Determination of copper content -- Oxalic acid bis-cyclohexylidene hydragide (cuprizone) spectrophotometric method	Valid
GB/T 6730.35-1986	239	Add to Cart	3 days	Methods for chemical analysis of iron ores. The oxalic acid bis-cyclohexylidene hydragide (cuprizone) photometric method for the determination of copper content	Obsolete

Similar standards

GB/T 6730.5 GB/T 6730.28 GB/T 6730.2 GB/T 6730.30 GB/T 6730.31 GB/T 6730.27

Basic data

Standard ID: GB/T 6730.35-2016 (GB/T6730.35-2016)
Description (Translated English): Iron ores -- Determination of copper content -- Oxalic acid bis-cyclohexylidene hydragide (cuprizone) spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Classification of International Standard: 73.060
Word Count Estimation: 10,172
Date of Issue: 2016-10-13
Date of Implementation: 2017-09-01
Older Standard (superseded by this standard): GB/T 6730.35-1986
Regulation (derived from): National Standard Notice No.1716 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

GB/T 6730.35-2016: Iron ores -- Determination of copper content -- Oxalic acid bis-cyclohexylidene hydragide (cuprizone) spectrophotometric method

---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.
Iron ores - Determination of copper content - Oxalic acid bis-cyclohexylidene hydragide (cuprizone) spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replace GB/T 6730.35-1986 Determination of copper content in iron ore - Dicyclohexanone oxalyl hydrazone Oxalicacidbis-cyclohexylidenehydragide (cuprizone) 2016-10-13 released 2017-09-01 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 6730 "iron ore" is divided into dozens of parts. This part is part 35 of GB/T 6730. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the GB/T 6730.35-1986 "iron ore chemical analysis method dicyclohexanone oxalyl dihydrazone photometric determination of copper". This part compared with GB/T 6730.35-1986, in addition to editorial changes, the main technical changes are as follows. --- the standard name to "iron ore copper content determination of dicyclohexanone oxalyl dihydrazone spectrophotometric method"; --- the scope of the determination of 0.010% to 1.00%; --- the sample decomposition method was simplified, can be directly acid soluble to ensure that the sample of copper completely decomposed, delete the residue recovery operation step; --- the sample volume, sub-volume, dilution volume volume, absorption plate, calibration curve of the measurement range to re-simplify the combination, easy operating; --- changed the reference of the sample, removed the calibration curve curve of the iron-based match; The inter-laboratory precision tests were carried out, and the "allowable difference" was replaced by the statistical repeatability r and the reproducibility limit R. This part is made by China Iron and Steel Industry Association. This section is headed by the National Commission on Standardization of Iron Ore and Direct Reductive Iron (SAC/TC317). This part of the drafting unit. Wuhan Iron and Steel (Group) Company, Metallurgical Industry Information Standards Institute. The main drafters of this part. Wen Xiangdong, Zhou Zheng, Chen Shihua, Zhang Suizhong, Xia Nianping, Zheng Xiaomin, Xie Fen, Wen Bin, Chen Zhibin. This part of the previous version of the standard to replace the release of the situation. --- GB/T 6730.35-1986. Determination of copper content in iron ore - Dicyclohexanone oxalyl hydrazone Spectrophotometry WARNING - Personnel using this section should have practical experience in formal laboratory work. This section does not indicate all possible security questions It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations.

1 Scope

This part of GB/T 6730 specifies the determination of copper content by dicyclohexanone oxalyl dithizone spectrophotometry. This part applies to the determination of copper content in iron ore, iron concentrate, sinter and pellets. Measurement range (mass fraction). 0.010% ~ 1.00%.

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. GB/T 6379.1 Accuracy of measurement methods and results (accuracy and precision) - Part 1. General and definitions GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) - Part 2. Determination of standard measurement methods The basic method of sex and reproducibility GB/T 6682 Analytical laboratory water specifications and test methods Preparation of pre - dried samples for analysis of iron ore GB/T 6730.1 Metallurgical products - Chemical analysis - Spectrophotometric methods Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170 GB/T 10322.1 Iron Ore Sampling and Sample Preparation GB/T 12806 laboratory glass instrument single standard line capacity bottle GB/T 12807 Laboratory glass instruments - Index pipettes GB/T 12808 Laboratory glass instruments Single line suction pipette

3 principle

The samples were decomposed with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid. Take a certain amount of test solution, with citric acid to cover iron, aluminum and other ions pH 9.2 to 9.3, dicyclohexanone oxalyl hydrazone forms a blue complex with copper (II) and is measured at a wavelength of 600 nm Its absorbance, calculated copper content in the sample.

4 Reagents and Materials

Unless otherwise stated, only the reagents identified as analytical reagents and those of Class 3 and Grade 3 in accordance with GB/T 6682 are used in the analysis. Water or deionized water or water equivalent to its purity. 4.1 mixed flux. 2 parts of sodium carbonate (anhydrous) and 1 part of boric acid at 105 ℃ ~ 110 ℃ drying 1h, fine grinding and mixing. With the wear bottle storage, Paul Stored in a dryer. 4.2 hydrochloric acid, ρ = 1.19 g/mL. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 6730.35-2016_English be delivered?

Answer: Upon your order, we will start to translate GB/T 6730.35-2016_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 6730.35-2016_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 6730.35-2016_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 Sales@ChineseStandard.net. 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.

Question 5: Should I purchase the latest version GB/T 6730.35-2016?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6730.35-2016 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.