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GB/T 6730.44-2017: Iron ores -- Determination of zinc content-1- (2-pyridylazo) -2-naphthol spectrophotometric method
Status: Valid GB/T 6730.44: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 6730.44-2017 | English | 199 |
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Iron ores -- Determination of zinc content-1- (2-pyridylazo) -2-naphthol spectrophotometric method
| Valid |
GB/T 6730.44-2017
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| GB/T 6730.44-1986 | English | 199 |
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Methods for chemical analysis of iron ores. The 1-(2-pyridylazo)-2-naphthol photometric method for the determination of zinc content
| Obsolete |
GB/T 6730.44-1986
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PDF similar to GB/T 6730.44-2017
Basic data | Standard ID | GB/T 6730.44-2017 (GB/T6730.44-2017) | | Description (Translated English) | Iron ores -- Determination of zinc content-1- (2-pyridylazo) -2-naphthol spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 10,18 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | Older Standard (superseded by this standard) | GB/T 6730.44-1986 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's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 6730.44-2017: Iron ores -- Determination of zinc content-1- (2-pyridylazo) -2-naphthol spectrophotometric method
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Iron ores - Determination of zinc content - 1- (2-pyridylazo) -2-naphthol spectrophotometric method
ICS 73.060.10
D31
National Standards of People's Republic of China
Replacing GB/T 6730.44-1986
Iron ore - Determination of zinc content
1- (2-pyridylazo) -2-naphthol spectrophotometry
1- (2-pyridylazo) -2-naphtholspectrophotometric 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 44.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 6730.44-1986 "Iron ore chemical analysis 1- (2-pyridylazo) -2-naphthol photometric method for the determination of zinc
Quantity ", this part compared with GB/T 6730.44-1986, except for some editorial changes, the main technical changes are as follows.
--- Standard name was changed to "Determination of zinc content of iron ore 1- (2-pyridylazo) -2-naphthol spectrophotometry";
--- Added "warning" "normative references" "instrument" and "test report" chapter;
--- Clear and standardized sample and sample preparation of the specific requirements;
--- Standard "sample size" to "sample volume", and clear the weighing accuracy;
--- Deleted the coefficient (1) in the coefficient "K" and "K" statement.
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/TC317) centralized.
This part of the drafting unit.Ningbo Inspection and Quarantine Science and Technology Research Institute, Alashankou Exit Inspection and Quarantine, China Inspection and Certification Group
Ningbo Co., Ltd., Ningbo Economic and Technological Development Zone Boren maritime test firm.
The main drafters of this section. Yuqing, Ho Yang, Lu Xinming, Liu Shuiqing, Zhang Aizhen.
This part of the standard replaces the previous version of the release.
--- GB/T 6730.44-1986.
Iron ore - Determination of zinc content
1- (2-pyridylazo) -2-naphthol spectrophotometry
Warning --- personnel using this section should have formal laboratory work experience. This section does not indicate all possible safety issues
Question, the user is responsible for taking appropriate safety and health measures, and to ensure compliance with the conditions of the relevant state laws and regulations.
1 Scope
GB/T 6730 provisions of this section 1- (2-pyridylazo) -2-naphthol spectrophotometric determination of zinc content.
This section applies to iron ore, iron ore, sinter and pellets. Measuring range (mass fraction) .0.010% ~ 0.500%.
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 ore 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
The sample was hydrochloric acid, nitric acid, hydrofluoric acid, sulfuric acid decomposition, filtration; residue to base melting. Add sodium fluoride, ammonium chloride, ammonium hydroxide and diethyl
Sodium dithiocarbamate (copper reagent) was subjected to precipitation. With methyl isobutyl ketone - ammonium thiocyanate extraction of zinc, with a large number of iron, copper, aluminum, manganese,
Nickel, cadmium and other elements of separation. Addition of 1- (2-pyridine azo) -2-naphthol (PAN) to the organic phase produces a red complex with zinc,
548nm Department, measured absorbance, to determine the zinc.
4 Reagents and materials
Unless otherwise indicated in the analysis, the use of only approved analytical reagent and in line with GB/T 6682 more than three distilled water or its
The purity of water.
4.1 anhydrous sodium carbonate.
4.2 Ammonium chloride.
4.3 Hydrochloric acid, p approximately 1.19 g/mL.
4.4 Nitric acid, p about 1.42 g/mL.
4.5 hydrofluoric acid, p approximately 1.15 g/mL.
4.6 Ammonium hydroxide, p about 0.90 g/mL.
4.7 anhydrous ethanol.
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