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GB/T 6730.42-2017 English PDF

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US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 6730.42-2017: Iron ores -- Determination of lead content -- Dithizone spectrophotometric method
Status: Valid

GB/T 6730.42: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.42-2017	199	Add to Cart	3 days	Iron ores -- Determination of lead content -- Dithizone spectrophotometric method	Valid
GB/T 6730.42-1986	199	Add to Cart	2 days	Methods for chemical analysis of iron ores. The dithizone photometric method for the determination of lead content	Obsolete

Similar standards

GB/T 6730.5 GB/T 6730.28 GB/T 6730.55 GB/T 6730.45 GB/T 6730.51 GB/T 6730.48

Basic data

Standard ID: GB/T 6730.42-2017 (GB/T6730.42-2017)
Description (Translated English): Iron ores -- Determination of lead content -- Dithizone spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Classification of International Standard: 73.060.10
Word Count Estimation: 10,138
Date of Issue: 2017-09-07
Date of Implementation: 2018-06-01
Older Standard (superseded by this standard): GB/T 6730.42-1986
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 6730.42-2017: Iron ores -- Determination of lead content -- Dithizone 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 lead content - Dithizone spectrophotometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replacing GB/T 6730.42-1986 Iron ores - Determination of lead content Dithizone spectrophotometric method 2017-09-07 Posted 2018-06-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

GB/T 6730 "iron ore" is divided into dozens of sections. This section GB/T 6730 Part 42. This section drafted in accordance with GB/T 1.1-2009 given rules. This section instead of GB/T 6730.42-1986 "Iron ore analysis method for the determination of lead content by dithihydrazone, this section GB/T 6730.42-1986 compared to editorial changes in addition to the main technical changes are as follows. --- Standard name was changed to "Determination of lead content in iron ore dithizone spectrophotometry"; --- Added "warning" "normative references" "instrument" and "test report" chapter and content, the original chapter number has been adjusted accordingly; --- Clear and standardized sample and sample preparation of the specific requirements; --- Standard "sample size" to "sample volume", and clear the weighing accuracy; --- Removed the coefficient (1) of the coefficient "K" and "K" of the statement; --- Added "the final result of the calculation." This part is proposed by China Iron and Steel Association. This part of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC319) centralized. This part of the drafting unit. Ningbo Inspection and Quarantine Science and Technology Research Institute, Anshan Iron and Steel Group Mining Co., Ltd., Metallurgical Industry Information Standards Institute. The main drafters of this section. Chen Hehai, Deng Yun, Li Yulu, Zhang Aizhen, Ren Chunsheng, Ying Haisong, Wang Yan, Chen Zi Bin, pay Ran Ran. This part of the standard replaces the previous version of the release. --- GB/T 6730.42-1986. Iron ores - Determination of lead content Dithizone spectrophotometric method Warning --- personnel using this section should have formal laboratory work experience. This section does not indicate all possible safety issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the requirements of the relevant state laws and regulations.

1 Scope

GB/T 6730 provisions of this part of the dithizone spectrophotometric determination of lead content. This section applies to iron ore, iron ore, sinter and pellets Determination of lead content. Measuring range (mass fraction) .0.010% ~ 0.50%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 analytical laboratory water specifications and test methods Preparation of pre-dried samples for analysis of iron ores GB/T 6730.1 GB/T 8170 rounded repair rules and limit values of the representation and judgment GB/T 10322.1 Iron ore sampling and sample preparation methods GB/T 12806 laboratory glassware single standard line capacity bottle GB/T 12807 Laboratory glassware graduated pipette GB/T 12808 laboratory glassware single standard pipette

3 principle

Sample with hydrochloric acid, nitric acid, perchloric acid decomposition, filtration; residue with sodium carbonate - boric acid melting, with ammonium citrate mask iron, aluminum and other metal ions, With ammonium hydroxide adjusted to pH7 ~ 9, with dithizone - chloroform, lead, zinc and other organic phase extraction, and then dilute hydrochloric acid stripped in the aqueous phase. in Ammonium citrate, hydroxylamine hydrochloride, potassium cyanide in the presence of pH adjusted to 8.5 ~ 11.0, plus dual sulfur - chloroform extraction color. At a wavelength of 510 nm Department of measurement of its absorbance, to determine the amount of lead.

4 Reagents and materials

Unless otherwise indicated in the analysis, the use of only recognized superior grade pure reagent and in line with the provisions of GB/T 6682 more than three or with its purity phase When the water. 4.1 mixed flux anhydrous sodium carbonate boric acid, 2 1, research fine, mix well. 4.2 Hydrochloric acid, about 1.19 g/mL. 4.3 nitric acid, about 1.42 g/mL. 4.4 Perchloric acid, about 1.67 g/mL. 4.5 hydrochloric acid lotion, 1 250, pH1.3 ~ 1.6, if necessary, calibrated with a pH meter. 4.6 perchloric acid, 1 100. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 6730.42-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 6730.42-2017_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 6730.42-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 6730.42-2017_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 6730.42-2017?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6730.42-2017 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.