YS/T 575.23-2009 English PDF (YST575.23-2009)

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YS/T 575.23-2009: Method for chemical analysis of aluminum ores. Part 23: Determination of element contents X-ray fluorescence spectrometric mehtod
YS/T 575.23-2009
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.10
H 30
Methods for chemical analysis of aluminum ores –
Part 23. Determination of element contents X-ray
fluorescence spectrometric method
ISSUED ON. DECEMBER 4, 2009
IMPLEMENTED ON. JUNE 01, 2010
Issued by. Ministry of Industry and Information Technology of People’s
Republic of China
Table of contents
Foreword ... 3 
1 Scope ... 6 
2 Principle of the method ... 6 
3 Reagent ... 7 
4 Instruments and apparatus ... 8 
5 Samples ... 8 
6 Analysis procedures ... 8 
7 Calculation of analysis results ... 10 
8 Precision... 11 
9 Quality assurance and control ... 14 
Appendix A (Informative) Operation parameters of X-ray fluorescence
spectrometer ... 15 
Foreword
YS/T 575-2007 “Methods for chemical analysis of aluminum ores” is consisted
of 24 parts in total.
Part 1. Determination of aluminum oxide content - EDTA titrimetric method
Part 2. Determination of silicon dioxide content - Gravimetric-molybdenum
blue photometric method
Part 3. Determination of silicon dioxide content - Molybdenum blue
photometric method
Part 4. Determination of iron oxide content - Potassium titrimetric method
Part 5. Determination of iron oxide content - Orthophenanthroline
photometric method
Part 6. Determination of titanium dioxide content - Diantipyrylmethane
photometric method
Part 7. Determination of calcium oxide content - Flame atomic absorption
spectrophotometric method
Part 8. Determination of magnesium oxide content - Flame atomic absorption
spectrophotometric method
Part 9. Determination of potassium oxide, sodium oxide content - Flame
atomic absorption spectrophotometric method
Part 10. Determination of manganese oxide content - Flame atomic
absorption spectrophotometric method
Part 11. Determination of chromium oxide content - Flame atomic absorption
spectrophotometric method
Part 12. Determination of vanadium pentoxide content - N-benzoyl-N-
phenylhydroxylamine photometric method
Part 13. Determination of zinc content - Flame atomic absorption
spectrophotometric method
Part 14. Determination of total content of rare earth oxide - Tribromo-
arsenazo photometric method
The responsible drafting organization of this part. China Aluminum Industry Co.,
Ltd. Zhengzhou Research Institute, China Nonferrous Metals Industry Standard
Metering Quality Institute.
The drafting organization of this part. China Aluminum Industry Co., Ltd.
Shandong Branch, Shanxi Luneng Jinbei Aluminum Co., Ltd., Cayman
Aluminum (Sanmenxia) Co., Ltd.
The main drafters of this part. Zhang Aifen, Zhang Shuchao, Ma Huixia, Lu Xia,
Wang Yunxia, Zhong Daiguo, Wang Xiaolei, Han Guifen, Li Yuling and Li Huiling.
Methods for chemical analysis of aluminum ores -
Part 23. Determination of element contents X-ray
fluorescence spectrometric method
1 Scope
This part specifies the methods for the determination of aluminum oxide, silica,
total iron (expressed by Fe2O3), titanium dioxide, potassium oxide, sodium
oxide, calcium oxide, magnesium oxide, phosphorus pentoxide, manganese
oxide, sulfur, vanadium, gallium and zinc, and the like, in the aluminum ores.
This part is applicable to the determination of the aluminum oxide, silica, total
iron (expressed by Fe2O3), titanium dioxide, potassium oxide, sodium oxide,
calcium oxide, magnesium oxide, phosphorus pentoxide, manganese oxide,
sulfur, vanadium, gallium and zinc, and the like, in the aluminum ores. It is also
applicable to the determination of the aforementioned elements in such
samples as clay and kaolin. As for the determination range, SEE Table 1.
Table 1
2 Principle of the method
2.1 USE the anhydrous lithium tetraborate and lithium metaborate mixed
reagent to melt the sample, in order to eliminate the mineral effects and particle
size effects; and CAST it into the glass sheet of the shape suitable for the X-ray
fluorescence spectrometer; MEASURE the fluorescence X-ray intensity of the
measured element in the glass sheet. USE the calibration curve or equation to
conduct analysis; the correction equation is established through using series
standard samples, and CONDUCT inter-element disturbance effect correction.
Composition Composition Content range (mass fraction)/% Content range (mass fraction)/%
4 Instruments and apparatus
4.1 Platinum-gold alloy crucible (95% Pt + 5% Au).
4.2 Platinum-gold alloy mold (95% Pt + 5% Au). The base thickness of the mold
material is about 1 mm, making it difficult to deform.
4.3 The melting vessel and mold can be combined into one. If the sample is
directly formed after being melted in the crucible, it requires the internal wall of
the crucible bottom flat and smooth, so that the glass sheet is easily peeled off
from the mold without being broken.
4.4 Melting machine. automatic flame melting or high-frequency induction
melting machine. If using other types of melting machines, the temperature is
not less than 1150 °C, AND the temperature shall be able to controlled, with the
temperature control accuracy at ± 15 °C.
4.5 Wavelength dispersive X-ray fluorescence spectrometer. end window
rhodium target X-ray tube.
4.6 Oven. controllable temperature 105 °C ± 5 °C.
5 Samples
5.1 The particle size of sample shall be less than 125 μm.
5.2 The sample shall be preheated in an oven (4.6) at 105 ° C ± 5 °C for 2 h,
placed in a desiccator and allowed to cool to room temperature.
6 Analysis procedures
6.1 Number of determinations
TAKE two samples for parallel determination, and TAKE their average value.
6.2 Sample
Based on the equipment used, accurately WEIGH the sample (5) and the flux
(3.1) according to the mass ratio of the sample to the flux of 1. 8 ~ 1.10.
6.3 Calibration test
Together with the sample, ANALYZE the standard samples of the same type.
6.5.4 Calibration. As for the elements with spectral line overlap interference, it
shall conduct the spectral line overlap interference correction. As for the zinc
and gallium element, it shall use the RATIO between the intensity and the RhKα
line Compton scattering intensity AND the recommended value regression
analysis to conduct calibration. As for the inter-element absorption-
enhancement effect, it shall use the theoretical α coefficient or the basic
parameter method to correct it.
6.6 X-Ray fluorescence spectrometry
6.6.1 PREHEAT the wavelength dispersive X-ray fluorescence spectrometer
(4.5) to stabilize it. Based on the X-ray tube type, ADJUST the tube voltage and
tube current. Based on the X-ray fluorescence spectrometer model, SELECT
the operating parameters (SEE Appendix A).
6.6.2 Measurement of monitoring sample. SET the monitoring sample name;
MEASURE the X-ray intensity of the analyzed element in the monitoring sample.
The reference intensity of the analyzed element in the monitoring sample must
be measured in the same machine start-up with the standard sample, in order
to ensure the validity of the drift calibration.
6.6.3 Measurement of standard sample. INPUT the standard sample name;
MEASURE the X-ray intensity of the analyzed element in the standard sample.
6.6.4 Measurement of unknown samples. START the quantitative analysis
program; MEASURE the monitoring sample; CONDUCT instrument drift
correction. MEASURE the standard sample which is prepared in the same
batch of the unknown sample. The element analysi...