HG/T 3482-1978 Chemical reagent lithium chloride (formerly HG/T 3-1160-78)
Some standard content:
Ministry of Petrochemical Industry of the People's Republic of China
Chemical Reagent
This reagent is colorless crystal, easily soluble in water, deliquescent in air. Molecular formula: LiCl·H20
Molecular weight: 60.41 (according to the international atomic weight of 1975)
1.LiC1·H0 content is not less than 97.0%.
2. Aqueous solution reaction: qualified.
3. Maximum impurity content (in %): Name
(1) Clarity test
(2) Water-insoluble matter
(3) Sulfate (SO.)
（4) Nitrate (NO:）
(5) Ammonium salt (NH4)
(6) Phosphate (PO4)
(7) Sodium (Na)
(8) Magnesium (Mg)
(9) Potassium (K)
(10) Calcium (Ca)
(11) Iron (Fe)
(12) Sodium (Ba)
(13) Heavy metal (in terms of Pb)
Analytically pure
II. Inspection rules
Sampling and acceptance shall be carried out in accordance with the provisions of GB619-77. 3. Test Methods
HG3-1160-78
Chemically pure
The standard solutions, impurity standard solutions, preparations and products required for determination shall be formulated in accordance with the provisions of GB601-77, GB602-77 and GB603-77. Issued by the Ministry of Petrochemical Industry of the People's Republic of China
Xi'an Petrochemical Bureau
October 1, 1978
Xi'an Chemical Reagent Factory
W.bzsosocomHG3-1160-78
1. Determination of LiC1·H20 content: Weigh 0.2 g of sample to the nearest 0.0002 g. Dissolve in 70 ml of water, add 10 ml of 1% starch solution, and titrate with 0.1N silver nitrate standard solution in the dark under shaking. When near the end point, add 3 drops of 0.5% fluorescein indicator solution and continue to titrate until the emulsion turns pink.
LiCI·H2O content% (X) is calculated as follows: X=V·CX0. 06041 ×100
Amount of silver nitrate standard solution, ml, where: V
C——Normal concentration of silver nitrate standard solution, N; G——Sample weight, g,
0.06041——Number of grams of LiCl·H20 per mg equivalent. 2. Aqueous solution reaction: Weigh 5 grams of sample to the nearest 0.01 gram. Dissolve in 100 ml of water without carbon dioxide and measure with an acidometer. The pH value should be between 4.5 and 7.5.
3. Impurity determination: The sample must be weighed to the nearest 0.01 gram. (1) Clarity test: Weigh 25 grams of sample and dissolve in 100 ml of water. The turbidity should not be greater than the clarity standard, analytically pure
chemically pure
No. 6.
(2) Water insoluble matter: Keep the solution for the clarity test in a water bath for 1 hour, filter it with a constant weight No. 4 glass filter, wash the filter residue with hot water until the washing liquid has no chloride ion reaction, and dry it at 105-110℃ to constant weight. The weight of the filter residue shall not exceed: · 25 mg
Analytical pure...
Chemical pure
5.00 mg.
(3) Sulfate: Weigh 0.5 g of sample, dissolve it in 25 ml of water, add 1 ml of 3N hydrochloric acid, keep it in a water bath at 30-35℃ for 10 minutes, add 3 ml of 25% barium chloride solution, shake the hook, and let it stand for 30 minutes. The turbidity shall not be greater than the standard. The standard is to take the following amount of SO4s
Analytical pure
Chemical pure
and treat it in the same way as the sample.
?0.05 mg;
0.10 mg.
(4) Nitrate: Weigh 1 g of sample, dissolve in 10 ml of water, add 1 ml of 10% sodium chloride solution, 1 ml of 0.001M sodium indigo disulfonate, add 10 ml of sulfuric acid within 10-15 seconds while shaking, and let stand for 10 minutes. The blue color should not be lighter than the standard. The standard is the following amount of NO3:
Analytical pure·
Chemical pure
Processed in the same way as the sample.
0.02 mg;
0.05 mg.
(5) Ammonium salt: Weigh 1 g of sample, dissolve in 25 ml of ammonia-free water, add 2 ml of 10% sodium hydroxide solution and 2 ml of Nessler's reagent, and shake to mix. The yellow color should not be darker than the standard. The standard is to take the following amount of NH4:
Analytical pure ·
Chemical pure
Treat in the same way as the sample.
0.02 mg;
0.05 mg.
(6) Phosphate: Weigh 1 gram of sample, dissolve in 20 ml of water, add 4 ml of 4N sulfuric acid and 1 ml each of phosphorus reagent A and B, shake well, and keep warm in a 60℃ water bath for 10 minutes. The blue color should not be darker than the standard. The standard is to take the following amount of PO4:
Analytical pure
.0.01 mg;
W.bzsoso:comChemical pure ·
Treat in the same way as the sample.
HG3-1160-78
0.03 mg.
(7) Sodium: Weigh 0.5 g of sample, dissolve in water, dilute to 100 ml, shake well. Measure with a flame photometer at 589 nm. The current value indicated by the galvanometer shall not be greater than the standard.
The standard is the following amount of Na:
Analytical pure
Chemical pure
Processed in the same way as the sample.
(8) Magnesium:
a. Atomic absorption spectrophotometry
Instrument conditions:
Light source: magnesium hollow cathode lamp;
Wavelength: 285.2 nm,
Flame: acetylene-air.
0.15 mg
0.50 mg.
Measurement method: Weigh 5 g of sample, dissolve in water, dilute to 100 ml, take 10 ml, and make four portions. Determine in accordance with the provisions of Article 2, Paragraph (2) of Chapter 2 of HG3-1013-76.
b. Chemical analysis method
Weigh 0.5 g of sample, dissolve in 20 ml of water, add 1 ml of 0.05% dar yellow solution, shake well, add 2.5 ml of 1N sodium hydroxide, shake well. The red color should not be darker than the standard. The standard is to take the following amounts of Mg:
Analytical pure
Chemical pure
Treat in the same way as the sample.
0.010 mg;
0.025 mg.
(9) Potassium: Weigh 1 g of sample, dissolve in water, dilute to 100 ml, shake. Measure with a flame photometer at 766.5 nm. The current value indicated by the galvanometer should not be greater than the standard.
The standard is to take the following amount of K:
Analytical pure...
Chemical pure
Handle it in the same way as the sample.
(10) Calcium:
Atomic absorption spectrophotometry
Instrument conditions: bzxZ.net
Light source: calcium hollow cathode lamp;
Wavelength: 422.7 nanometers;
Flame: acetylene-air.
.0.3 mg,
0.5 mg.
Determination method: Weigh 10 g of sample, dissolve it in water, dilute to 100 ml, take 20 ml, and make four portions. Determine according to the provisions of Article 2, Paragraph (2) of Chapter 2 of HG3-1013-76.
b. Chemical analysis method
Weigh 0.5 g of sample, dissolve it in water, and dilute to 50 ml. Take 4 ml, dilute to 15 ml, add 10 ml 95% ethanol, 0.5 ml mixed alkali and 1 ml 0.2% ethanol solution of glyoxal acetal (o-aminophenol), shake well and let stand for 5 minutes. Extract with 5 ml chloroform (temperature not exceeding 30°C) and compare immediately. The red color of the organic layer shall not be darker than the standard. The standard is to take 4 ml of calcium-free lithium chloride solution and the following amount of Ca:3
W.bzsoso:com analytical pure·
chemical pure·
HG3-1160-78
dilute to 15 ml, and treat the same volume of sample solution at the same time. Note: Preparation of calcium-free lithium chloride solution - 0.002 mg;
: 0.008 mg.
- Weigh 0.5 g of analytical pure sample, dissolve in 10 ml water, add 10 ml 95% ethanol, 0.5 ml mixed alkali and 1 ml 0.2% ethanol solution of glyoxal bis(o-aminophenol), shake well and let stand for 5 minutes. Extract with 5 ml of chloroform, separate the organic layer, and continue to extract with chloroform until the organic layer is colorless. Neutralize the aqueous layer with 3N hydrochloric acid and dilute to 50 ml. (11) Iron: Weigh 1 gram of sample, dissolve in 20 ml of water, add 2 ml of 10% sulfosalicylic acid solution, shake well. Add 5 ml of 10% chlorine water and shake well. The yellow color should not be darker than the standard. The standard is to take the following amount of Fe:
Analytical pure
Chemical pure·
Treat in the same way as the sample.
0.01 mg,
0.03 mg.
(12) Barium: Weigh 2 grams of sample, dissolve in 10 ml of water, add 5 ml of 95% ethanol, add 1 ml of 4N sulfuric acid, shake well and let stand for 10 minutes. The turbidity should not be greater than the standard. The standard is to take the following amount of Ba:
Analytical pure
Chemical pure
Handle it in the same way as the sample.
0.1 mg,
0.2 mg.
(13) Heavy metals: Weigh 2 grams of sample, dissolve in water, and dilute to 40 ml. Take 30 ml, dilute to 40 ml, add 1 ml of 1N acetic acid and 10 ml of freshly prepared saturated hydrogen sulfide water, shake well, and let stand for 10 minutes. The dark color should not be darker than the standard. The standard is to take the remaining 10 ml of sample solution and the following amount of Pb: Analytical pure
Chemical pure
Dilute to 40 ml, and treat it in the same way as the same volume of sample solution. IV. Packaging and marking
1. Packaging: in accordance with the provisions of HG3-11964. Inner packaging: G2, Gz-2; G-3, Gz-3 Outer packaging: I-1, I, Ⅱ:
Packing unit: Class 4.
2. Marking: According to the provisions of HG3-11964. 4
0.01 mg,
…·..05 mg.
W.
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