GB/T 6730.44-2017 in English

VALID

Iron ores―Determination of zinc content―1-(2-pyridylazo)-2-naphthol spectrophotometric method

Issued on:2017-09-07
Implemented on:2018-06-01
File Format:PDF
Delivery:Within 1 day

Price(USD)： $128.00
$125.00

Standard No:	GB/T 6730.44-2017
Document status:	VALID
Title in English:	Iron ores―Determination of zinc content―1-(2-pyridylazo)-2-naphthol spectrophotometric method
Title in Chinese:	铁矿石锌含量的测定 1-(2-吡啶偶氮)-2-萘酚分光光度法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Within 1 day
Issued on:	2017-09-07
Implemented on:	2018-06-01
Superseding:	GB 6730.44-1986 Methods for chemical analysis of iron ores - The 1-(2-pyridylazo)-2-naphthol photometric method for the determination of zinc content
ICS Classification:	73.060.10-Iron ores
Chinese Classification:	D31-Iron ore
Professional Classification:	GB-National Standard
Related Keywords:	spectrophotometric method steps detailed description sample decomposition spectrophotometric method introduction national standard zinc content method name 6730.44-2017 determination
Related Topics:	GB/t 6730.44 Azo compound spectrophotometry Total Iron Determination Pyridine Pyridine UV Fluorescence Zinc content Spectrophotometric pyridine content Determination of zinc content Spectrophotometric Determination of Phenols Iron Ore Zinc Spectroscopy Perampaner Azo Reagent Spectrophotometry Determination of pyridine spectrophotometric method Determination of total nitrogen content by spectrophotometry Phenol Reagent Spectrophotometry Determination of naphthalene content by spectrophotometry Naphthalene photoactive iron ore zinc Spectrophotometer iron content Luminescence of naphthalene iron ore content Naphthalene quantitative analysis Iron Determination Bipyridine air phenol spectrophotometry Pyridine Determination of Trace Iron GB/T 6730.44 GB/T 6730.44-1986 GB/T 6730.44-2017 Determination of nitrogen content spectrophotometer Determination of Trace Iron by Bipyridine Spectrophotometry Total nitrogen absorbance is more than 2 points Spectrophotometric method for measuring solid nitrogen content Spectrophotometric Trinitrogen Test Method

Introduction

National Standard of the People's Republic of China

GB/T 6730.44-2017 Determination of zinc content in iron ore

1-(2-pyridylazo)-2-naphthol spectrophotometric method

Steps	Detailed description
Sample decomposition	The sample is decomposed with hydrochloric acid, nitric acid, hydrofluoric acid, and sulfuric acid, filtered; the residue is melted with alkali.
Separation steps	Add sodium fluoride, ammonium chloride, ammonium hydroxide and sodium diethyldithiocarbamate (copper reagent) for precipitation and separation. Use methyl isobutyl ketone-ammonium thioxoate to extract zinc and separate it from a large amount of iron, copper and other elements.
Color development and measurement	1-(2-pyridylazo)-2-naphthol (PAN) was added to the organic phase to generate a red complex, and the absorbance was measured at 548 nm.

Standard framework comparison

Compared with the old version GB/T 6730.44-1986, the new standard GB/T 6730.44-2017 has the following major changes:

Updated the method name and scope of application
Added "Warning", "Normative Reference Documents", "Instrument" and "Test Report" chapters
Clarified the specific requirements for sampling and sample preparation
Optimized the provisions for sample quantity and weighing accuracy

More samples: GB 50021-2001(2009) NB/T 47013.2-2015 JJG 21-2008

Sample only — not a preview of GB/T 6730.44-2017

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