GB/T 6730.87-2023 in English

VALID

Iron ores―Determination of total iron and other multi-element content―Wavelength dispersive X-ray fluorescence spectrometry (cobalt internal standard method)

Issued on:2023-08-06
Implemented on:2024-03-01
File Format:PDF
Delivery:Within 1 day

Price(USD)： $392.00
$381.00

Standard No:	GB/T 6730.87-2023
Document status:	VALID
Title in English:	Iron ores―Determination of total iron and other multi-element content―Wavelength dispersive X-ray fluorescence spectrometry (cobalt internal standard method)
Title in Chinese:	铁矿石全铁及其他多元素含量的测定波长色散X射线荧光光谱法（钴内标法）
Language:	English
File Format:	Electronic (PDF)
Delivery:	Within 1 day
Issued on:	2023-08-06
Implemented on:	2024-03-01
ICS Classification:	73.060.10-Iron ores
Chinese Classification:	D31-Iron ore
Professional Classification:	GB-National Standard
Related Keywords:	cobalt internal standard method internal standard method using co₂o₃ internal standard elements simultaneous xrf+cobalt internal standard method implementation recommendations traditional external standard method melting sample preparation
Related Topics:	Internal standard Determination method of iron element internal standard Measurement wavelength Element content X-ray fluorescence element content Chromatographic element content x-ray spectrum element Specific fluorescence wavelength The spectral wavelength of silicon element wavelength dispersion Spectral internal standard Multispectral quantification Element content spectrum Fluorescence Quantitative Multiplex fluorescent iron ore Lithium wavelength The wavelength of each element Phytochrome spectrum The wavelength of iron Elemental Standard Spectroscopy Spectrophotometric testing of cobalt content Determination of multi-element content of iron and steel - routine method by x-ray fluorescence spectrometry fluorescence scattering method Spectrum and Wavelength wavelength dispersive x-ray fluorescence Element Spectral Wavelength Spectral wavelength of nickel element Emission spectrum of iron element Wavelength and Element fluorescence scattering method Many peaks in the fluorescence spectrum Iron wavelength Rapid Determination of Eight Elements in Phosphate Rock and Phosphate Concentrate by X-ray Fluorescence Spectrometry wavelength dispersive x-ray wavelength dispersive x-ray fluorescence spectrometry Determination of Aluminum and Barium Content by Wavelength Dispersive X-ray Fluorescence Spectrometry Determination of copper, zinc, barium and lead content by wavelength dispersive x-ray fluorescence spectrometry X fluorescence wavelength of each element Determination of Inorganic Elements in Ore by X-ray Fluorescence Spectrometry Spectrum Iron Other polyphenols wavelength dispersive spectrometry wavelength dispersion quantification Iron content method Ground Object Spectrum and Its Measurement Measurement of wavelength dispersive x-ray fluorescence spectrometry gold element wavelength Zinc element wavelength Element Spectral Wavelength Measure the wavelength of x-rays polychromatic rays wavelength x-ray internal standard method multicolor fluorescence Domestic Fluorescence Quantitative colored solution multi-wavelength ore multi-element content polarimetry wavelength multi-wavelength fluorescence multi-element ore Iron content by fluorescence method Wavelength Dispersive X-ray Fluorescence Spectrometry of Iron Ore Elemental internal standard method Iron spectrometry X-ray fluorescent iron Multispectral Forensic cesium wavelength Sulfur Specific Wavelength Measurement wavelength fluorescence spectroscopy Iron method The wavelength of zinc spectral scattering method Zinc element wavelength Iron spectrum Iron spectrum spectrometer element How to measure the wavelength of spectrum Nickel wavelength Elemental Fluorescence The wavelength of the ore Spectral wavelength of copper element cobalt ray energy light wavelength element x-ray wavelength Content Method Wavelength Pigment Content Spectrum How long is the spectrum Elemental Iron Ore What is the wavelength of zinc element x fluorescent iron What is the wavelength of fluorescence x-ray fluorescence spectrometry Internal standard method + standard Fluorescein content Fluorescein content Multi-element ore x Fluorescence Dispersion Stoney Phosphorus multicolor fluorescence Fluorescence Spectrum Determination Wavelength Fluorescence Method for Determining Wavelength full wavelength spectrum Wavelength Chromatic Scattered Fluorescence Fluorescence measurement wavelength Dispersive Wavelength X-rays Iron cobalt color Luciferase wavelength Is the wavelength of emitted light determined by energy? The composition of the elemental standard spectrum used in iron spectroscopy 7. Comparison between fluorescence spectroscopy and other methods Spectrophotometry and its standard curve

《GB/T 6730.87-2023铁矿石全铁及其他多元素含量的测定波长色散X射线荧光光谱法（钴内标法）》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

Analysis of the core technology of standard

Technical elements	Innovation points	Comparison with traditional methods
Cobalt internal standard method	Using Co₂O₃ as the internal standard to correct the matrix effect	The accuracy is improved by 30% compared with the traditional external standard method
Melting sample preparation	4 fusion methods are optional (Clause 8.3-8.6)	Eliminate mineral effect and reduce the detection limit by 1 order of magnitude
Synchronous detection of multiple elements	16 elements measured at one time (TFe, Si, Al, etc.)	Analysis efficiency increased by 5-8 times

Key operating points

Glass sheet preparation specifications

The standard stipulates that the sample volume is 0.4-0.8g, the flux ratio is 10-15 times, and the amount of cobalt trioxide added is 0.1-0.2g (accuracy ±0.2mg). The melting temperature is strictly controlled in the range of 1040-1100℃, and a platinum-gold alloy (95:5) crucible is used to avoid element contamination.

Instrument parameter optimization

It is recommended to use LiF200 crystal to measure FeKβ line (tube voltage 40kV, tube current 60mA), and PET crystal to measure SiKα line. Pay special attention to the spectral interference of Br on Al (Article 5.22), which requires mathematical correction.

Quality Control System

Precision requirement: When TFe is in the range of 38-73%, the repeatability limit is r=0.5911-0.001528m (m is the average value). Use formula (3) to correct the cobalt content:
w₄=w₂-w₃×(m₅/m₆)/100
Where w₃ is the Co₂O₃ content, and m₅/m₆ is the mass ratio of the sample to cobalt.

Comparison of Standard Evolution

Version	Detection Elements	Technical Features
1986 Edition	Single Element Determination	Mainly Chemical Wet Method
2023 Edition	16 Elements Simultaneous	XRF+Cobalt Internal Standard Method

Implementation Recommendations

The laboratory needs to be equipped with a wavelength dispersive X-ray fluorescence spectrometer (in accordance with JJG 810) and a platinum crucible
It is recommended to establish a calibration curve with more than 5 points, including high and low concentration standard samples
Perform instrument drift correction every 4 hours (Formula 4-5)
Abnormal data needs to be reviewed according to the flowchart in Appendix B

More samples: NB/T 47013.2-2015 JC/T 2453-2018 JGJ 94-2008

Sample only — not a preview of GB/T 6730.87-2023

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