SN/T 2262-2009 English PDF (SNT2262-2009)

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SN/T 2262-2009: Determination of aluminum, arsenic, calcium, copper, magnesium, manganese, phosphorus, lead, zincum in iron ores. Inductively coupled plasma atomic emission spectrometry
SN/T 2262-2009
ENTRY-EXIT INSPECTION AND QUARANTINE INDUSTRY
STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
Determination of aluminum, arsenic, calcium, copper,
magnesium, manganese, phosphorus, lead, zincum in
iron ores - Inductively coupled plasma atomic
emission spectrometry
ISSUED ON: FEBRUARY 20, 2009
IMPLEMENTED ON: SEPTEMBER 01, 2000
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Method summary ... 5 
4 Reagents ... 5 
5 Instruments and apparatuses ... 5 
6 Sample ... 6 
7 Analysis steps ... 6 
8 Results calculation and expression ... 7 
9 Precision ... 7 
Appendix A (Informative) Instrument working conditions ... 8 
Appendix B (Informative) Element analytical line and detection-limit ... 9 
Appendix C (Informative) Microwave digestion program ... 10 
Determination of aluminum, arsenic, calcium, copper,
magnesium, manganese, phosphorus, lead, zincum in
iron ores - Inductively coupled plasma atomic
emission spectrometry
1 Scope
This Standard specifies the method for the determination of aluminum, arsenic,
calcium, copper, magnesium, manganese, phosphorus, lead, and zincum in
iron ore by inductively coupled plasma atomic emission spectroscopy (ICP-
AES).
This Standard applies to the determination of aluminum, arsenic, calcium,
copper, magnesium, manganese, phosphorus, lead, and zincum in iron ore.
The determination range of each element is shown in Table 1.
Table 1 -- Determination items and determination range
Element Determination range /% Element Determination range /%
Al 0.05 ~ 6.00 Mn 0.002 ~ 1.20
As 0.02 ~ 0.30 P 0.01 ~ 0.60
Ca 0.01 ~ 1.20 Pb 0.004 ~ 0.30
Cu 0.005 ~ 0.30 Zn 0.003 ~ 1.20
Mg 0.005 ~ 1.20
2 Normative references
The terms in the following documents become the terms of this Standard by
reference to this Standard. For dated references, all subsequent amendments
(not including errata content) or revisions do not apply to this standard. However,
parties to agreements that are based on this Standard are encouraged to study
whether the latest versions of these documents can be used. For undated
references, the latest edition applies to this Standard.
GB/T 6730.1, Iron ores - Preparation of predried test samples for chemical
analysis
GB/T 6682, Water for analytical laboratory use - Specification and test
methods
5.2 High-pressure closed microwave digestion system: adjustable and self-
controlled pressure (0 MPa ~ 4 MPa).
6 Sample
Prepare the sample according to GB/T 6730.1; dry it in an oven at (105 ± 5)°C
for 2 h; place it in a desiccator to cool to room temperature.
7 Analysis steps
7.1 Weigh 0.2 g (accurate to 0.000 1 g) of sample; put it in an about 100 mL
polytetrafluoroethylene digestion tank; add a small amount of water to wet; add
6 mL of hydrochloric acid (4.1), 2 mL of nitric acid (4.2), 1 mL of hydrofluoric
acid (4.4); shake gently; cover the digestion tank tightly; put it into the
microwave digestion furnace; close the furnace door; operate according to the
set procedure (see Appendix C) according to the microwave digestion system
operating procedures; after the sample is completely digested, remove for
cooling; open the digestion tank; add 10 mL of boric acid solution (4.5); then,
tightly close the digestion tank; put it in the microwave digestion furnace; heat
for 3 min; take out for cooling; transfer all the test solution into a 100 mL
volumetric flask; use water to fix-volume; shake well; after the test solution is
clarified, test.
Weigh two samples at the same time for parallel determination; take the
average value as the result.
Carry out a blank test along with the sample.
7.2 Turn on the instrument in accordance with the operating procedures;
optimize the instrument's operating parameters; perform the determination after
the instrument is stable.
7.3 Determine the spectral line intensity of each element in the mixed standard
series solution according to the analysis conditions of the corresponding
instruments; prepare the corresponding calibration working curve. The linear
correlation coefficient of the curve is required to be greater than 0.999. See
Table 2 for the standard solution series concentration.
7.4 Determine the spectral line intensity of each test element in the blank
solution and the sample solution according to the conditions of the
corresponding instrument; calculate the concentration of each test element
from the calibration working curve.