GB/T 6730.74-2017 in English

VALID

Iron ores--Determination of magnesium content--Flame atomic absorption spectrometric method

Issued on:2017-09-07
Implemented on:2018-06-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $220.00
$214.00

Standard No:	GB/T 6730.74-2017
Document status:	VALID
Title in English:	Iron ores--Determination of magnesium content--Flame atomic absorption spectrometric method
Title in Chinese:	铁矿石镁含量的测定火焰原子吸收光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-09-07
Implemented on:	2018-06-01
ICS Classification:	73.060.10-Iron ores
Chinese Classification:	D31-Iron ore
Professional Classification:	GB-National Standard
Related Keywords:	analysis method atomic absorption spectrophotometry flame flame atomic absorption spectrometry iron ore atomic absorption atomic absorption spectrometry
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《GB/T 6730.74-2017铁矿石镁含量的测定火焰原子吸收光谱法》由TC317（全国铁矿石与直接还原铁标准化技术委员会）归口，主管部门为中国钢铁工业协会。

Introduction

1. Background and significance of the standard

GB/T 6730.74-2017 is part of the "Iron Ore" series of standards, which mainly stipulates the method for determining the magnesium content in iron ore using flame atomic absorption spectrometry. This standard replaces the old version of GB/T 6730.14-1986 and introduces new technical requirements and methods.

2. Comparison of standard frameworks

Standard content	1986 edition	2017 edition
Measurement range	<0.005% ~ 1.2%	0.03% ~ 3.50%
Applicable sample types	Iron ore, concentrate	Natural iron ore, concentrate, sintered ore, pelletized ore
Analysis method	Atomic absorption spectrophotometry	Flame atomic absorption spectrometry

3. Technical requirements and operating steps

Flame atomic absorption spectrometer is the core instrument of this determination method and must meet the performance requirements of GB/T 7728. The analysis steps include sample decomposition, residue treatment, test solution preparation and absorbance measurement.

Sample decomposition: Dissolve the sample with hydrochloric acid and nitric acid and evaporate to dryness at high temperature.
Residue treatment: Use a platinum crucible to burn in a high-temperature furnace until it is completely melted.
Test solution preparation: Add a release agent (lanthanum chloride or strontium chloride) and dilute.
Absorbance measurement: Measure the absorbance of magnesium at a wavelength of 285.2 nm and draw a calibration curve to calculate the content.

4. Implementation Recommendations

When implementing this standard, laboratories should ensure that:

Instrument calibration meets the requirements.
Operators receive professional training.
The accuracy of analytical results is verified regularly.
Blank tests and standard sample tests are maintained to monitor method performance.

More samples: QC/T 942-2021 DL/T 5154-2012 JC/T 2453-2018

Sample only — not a preview of GB/T 6730.74-2017

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