HG/T 4823-2023 English PDF (HGT4823-2023)

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HG/T 4823-2023: Manganese sulfate for battery materials
HG/T 4823-2023
HG
CHEMICAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.50
CCS G 12
Replacing HG/T 4823-2015
Manganese sulfate for battery materials
ISSUED ON. JULY 28, 2023
IMPLEMENTED ON. FEBRUARY 01, 2024
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Molecular formula and relative molecular mass... 6
5 Classification... 6
6 Requirements... 6
7 Test method... 8
8 Inspection rules... 35
9 Marking and accompanying documents... 36
10 Packaging, transportation, storage... 36
Appendix A (Informative) Reference wavelength of analytical spectrum... 37
Appendix B (Informative) Recommended operating conditions of ion chromatograph
... 38
Manganese sulfate for battery materials
1 Scope
This document specifies the classification, requirements, test methods, inspection rules,
marking and accompanying documents, packaging, transportation, storage of
manganese sulfate for batteries.
This document is applicable to manganese sulfate for batteries.
Note. This product is mainly used to prepare precursors for positive electrode materials of
secondary lithium batteries (nickel-cobalt-manganese ternary composite hydroxides, nickel-
manganese ternary hydroxides, etc.); it can also be used to manufacture other manganese salts.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. For dated references, only the version
corresponding to that date applies to this document; for undated references, the latest
version (including all amendments) applies to this document.
GB/T 191-2008 Packaging - Pictorial marking for handling of goods
GB/T 6003.1-2022 Test sieves - Technical requirements and testing - Part 1.Test
sieves of metal wire cloth
GB/T 6678 General principles for sampling chemical products
GB/T 6682-2008 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
HG/T 2962-2010 Manganous sulphate for industrial use
HG/T 3696.1 Inorganic chemicals for industrial use - Preparations of standard and
reagent solutions for chemical analysis - Part 1.Preparations of standard volumetric
solutions
HG/T 3696.2 Inorganic chemicals for industrial use - Preparations of standard and
reagent solutions for chemical analysis - Part 2.Preparations of standard solutions
for impurity
cadmium (Cd), chromium (Cr), potassium (K), sodium (Na), calcium (Ca), magnesium
(Mg), nickel (Ni), cobalt (Co), aluminum (Al) prepared according to HG/T 3696.2.
Place them in a 100 mL volumetric flask. Use nitric acid solution to dilute it to the mark
(see 7.4.2.2). Shake well.
It can also use solutions of certified series of national standard substances for accurate
dilution.
The solution is prepared before use.
7.4.2.4 Water. Meet the grade 2 water specifications in GB/T 6682-2008.
7.4.3 Instruments and equipment
Inductively coupled plasma emission spectrometer.
7.4.4 Test steps
7.4.4.1 Drawing of working curve
Pipette 0.00 mL, 1.00 mL, 2.00 mL, 4.00 mL, 8.00 mL, 12.00 mL of the mixed standard
solution respectively. Place in six 100 mL volumetric flasks. Use nitric acid solution to
dilute it to the mark (see 7.4.2.2). Shake well.
Adjust the inductively coupled plasma emission spectrometer to the optimal working
conditions. Introduce the above standard solution into the inductively coupled plasma
emission spectrometer. Analyze the spectral line wavelength as shown in Appendix A
or select according to the instrument manual. Determine the spectral intensity of each
element to be measured in the standard solution. Use the mass concentration (μg/mL)
of the element to be measured in the standard solution as the abscissa and the
corresponding spectral intensity as the ordinate, to draw the working curve of each
element to be measured.
7.4.4.2 Preparation of test solution
7.4.4.2.1 Preparation of test solution for solid specimen
Weigh about 1.0 g (accurate to 0.0002 g) of the specimen. Place it in a 100 mL beaker.
Moisten it with a small amount of water. Add 4 mL of nitric acid solution (see 7.4.2.1).
Cover with a watch glass. Heat at low temperature until almost dry. After cooling, add
a small amount of water to dissolve. Transfer the solution into a 100 mL volumetric
flask. Use water to dilute to the mark. Shake well. Dilution can be performed if
necessary, depending on the sample and instrument conditions.
7.4.4.2.2 Preparation of test solution for liquid specimen
Take 5.00 mL of the specimen. Place it in a 100 mL volumetric flask. Add 4 mL of nitric
acid solution (see 7.4.2.1). Use water to dilute to the mark. Shake well. Dilution can be
ρi - The mass concentration of the element to be determined in the test solution found
from the working curve, in micrograms per milliliter (μg/mL);
ρ0 - The mass concentration of the element to be determined in the blank test solution
found from the working curve, in micrograms per milliliter (μg/mL);
V - The volume of the liquid sample to be transferred, in milliliters (mL).
The arithmetic mean of the parallel determination results is taken as the determination
result; the absolute difference between the two parallel determination results is not
greater than 20% of the arithmetic mean.
7.5 Determination of lead content - Atomic absorption method (arbitration
method)
7.5.1 Reagents or materials
7.5.1.1 Chloroform.
7.5.1.2 Hydrochloric acid.
7.5.1.3 Nitric acid.
7.5.1.4 Nitric acid solution. 2 + 98.
7.5.1.5 Sodium hydroxide solution. 250 g/L.
7.5.1.6 Ammonium pyrrolidine dithiocarbamate (APDC) solution. 20 g/L.
Filter before use.
7.5.1.7 Lead standard solution. 1 mL of solution contains 0.010 mg of lead (Pb).
Pipette 1.00 mL of the lead (Pb) standard solution prepared according to HG/T 3696.2
into a 100 mL volumetric flask. Use nitric acid solution to dilute it to the mark. Shake
well.
It can also use the solution of the certified series of national standard substances for
accurate dilution.
The solution is prepared before use.
7.5.1.8 Water. Meet the grade 2 water specification in GB/T 6682-2008.
7.5.2 Instruments and equipment
Atomic absorption spectrophotometer. Equipped with a lead hollow cathode lamp.
7.5.3 Test steps
7.6.1.2.1 Ethanol.
7.6.1.2.2 Nitric acid solution. 1+1.
7.6.1.2.3 Silver nitrate solution. 17 g/L.
7.6.1.2.4 Chloride standard solution. 1 mL of solution contains 0.02 mg of chlorine (Cl).
Use a pipette to transfer 2 mL of the chloride (as Cl) standard solution prepared
according to HG/T 3696.2.Place it in a 100 mL volumetric flask. Use water to dilute to
the mark. Shake well.
This solution is prepared immediately before use.
7.6.1.3 Instruments and equipment
Visible spectrophotometer. Equipped with a 2 cm cuvette.
7.6.1.4 Test steps
7.6.1.4.1 Drawing of working curve
Pipette 0.00 mL, 0.50 mL, 1.00 mL, 2.00 mL, 3.00 mL, 4.00 mL of chloride standard
solution. Place them in six 50 mL volumetric flasks respectively. Add 5 mL of nitric
acid solution and 2 mL of silver nitrate solution in turn. Then add 1 mL ~ 2 mL of
ethanol. Use water to...