Some standard content:
ICS65.080
Registration No.: 2776—1999
Chemical Industry Standard of the People's Republic of China
HG/T3589—1999
Humic acid for lead-acid storage batteryuse1999-04-20 Issued
2000-04-01 Implementation
State Administration of Petroleum and Chemical Industry Issued
WHG/T3589—1999
This standard is formulated based on relevant domestic and foreign information and combined with my country's actual situation, thus providing a unified technical basis for humic acid for lead-acid batteries in my country.
This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Fertilizers and Soil Conditioners. Drafting units of this standard: Shanghai Chemical Industry Research Institute of the Ministry of Chemical Industry and Fujian Hui'an Humic Acid Factory. The main drafters of this standard are: Li Liangjun, Zhu Tao, Dong Xuesheng, Zhang Xiande, Zhuang Qingren, Liu Yuqin, Cheng Shaoxin. This standard is published for the first time.
W.bzsoso.cOm1 Scope
Chemical Industry Standard of the People's Republic of China
Humic acid used for the lead-acid storage battery
Humic acid used for the lead-acid storage batteryHG/T3589—1999
This standard specifies the requirements, test methods, inspection rules, and packaging, labeling, storage and transportation of humic acid used for lead-acid storage batteries. This standard applies to humic acid used as a cathode expander for lead-acid batteries produced from peat, lignite and weathered coal. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T
3 Requirements
601-88
1250—89
Chemical reagents Preparation of standard solutions for titration analysis (volume analysis) Preparation of preparations and products used in test methods Chemical reagents
Expression and determination methods of limit values 6678—86 General rules for sampling of chemical products
668292
: Specifications and test methods for water used in analytical laboratories (eqvISO3696:1987) 3.1 Appearance: brown-black or brown powder.
3.2 Humic acid for lead-acid batteries should meet the requirements of Table 1. Table 1 Requirements for humic acid for lead-acid batteries
Humic acid (HA) content (on dry basis), %
Water (H20), %
Ash (on dry basis), %
Alkali insoluble matter (on dry basis), %
Iron (Fe) content, %
Chlorine (CI) content, %
Nitrate (NO:) content
Fineness (through a=0.125mm sieve), %
4 Test method
Test qualified
Unless otherwise specified, the reagents used in this standard are all analytically pure, and water should meet the third-grade water specifications in GB/T6682. If the solvent is not specified in the solution, it is an aqueous solution.
The standard solutions, preparations and products required in the test shall be prepared in accordance with the provisions of GB/T601 and GB/T603 unless otherwise specified.
4.1 Determination of humic acid content
Approved by the State Administration of Petroleum and Chemical Industry on April 20, 1999 and implemented on April 1, 2000
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4.1.1.1 Summary of method
HG/T 3589—1999
Humic acid is dissolved with alkali, and the humic acid content is calculated based on the amount of insoluble matter, and corrected with inorganic salts. 4.1.1.2 Reagents and solutions
Sodium hydroxide solution: 10g/L.
4.1.1.3 Instruments and equipment
Usually laboratory instruments and:
4.1.1.3.1 Constant temperature drying oven: temperature control range (room temperature ~ 200℃, fluctuation ± 2℃)4.1.1.3.2 Centrifuge: minimum speed is 2000r/min, centrifuge cup volume is greater than 150mL;4.1.1.3.3 Constant temperature water bath: temperature control range (room temperature ~ 100℃);4.1.1.3.4 Box-type resistance furnace: temperature control range (room temperature ~ 1000℃);4.1.1.3.5 Quantitative filter paper (slow speed);
4.1.1.3.6 Flat ground-mouth glass weighing bottle: d50mm×30mm. 4.1.1.4 Analysis steps
4.1.1.4.1 Test material
Weigh about 0.2g of test material (accurate to 0.0002g). 4.1.1.4.2 Dissolution and centrifugation
Put the test material into a 250mL conical flask, add 100mL of sodium hydroxide solution (4.1.1.2.1), insert a small glass funnel into the mouth of the flask, heat in a boiling water bath for 1h, shake once every 20min, cool to room temperature, then transfer the material into a centrifuge cup, centrifuge at 2000r/min for 30min, decant the supernatant, wash the insoluble matter with 200mL of water twice, centrifuge and separate after each wash to obtain the insoluble matter.
4.1.1.4.3 Filtration and drying
Dry the quantitative filter paper and weighing bottle in a drying oven at 105-110℃ to constant weight, transfer all the above insolubles to the filter paper for filtration, and wash with water until the filtrate is neutral. Put the insolubles and the filter paper into the weighing bottle, dry at 105-110℃ for 2h, take out the weighing bottle and cover it, first cool it in the air for 23min, then put it in a dryer to cool to room temperature (about 20min), weigh it, repeat drying, cooling and weighing until the difference between two consecutive weighings is 0.0010g, and calculate the mass of the insolubles (m1). 4.1.1.4.4 Ashing
Transfer the above insolubles (m1) together with the filter paper into a box-type resistance furnace that has been weighed at (600±20)℃. Leave a gap of 15-20mm on the furnace door. Slowly ash from room temperature to 250-300℃. After ash is completed, close the furnace door and burn at (820±20)℃ for 1h. After taking out, cool in the air for 5min, then put it in a dryer to cool to room temperature (about 20min), weigh it, and calculate the mass m2 of the ignition residue of the insoluble matter m1.
4.1.1.5 Expression of analysis results
The humic acid content (on a dry basis) X1 expressed as mass percentage (%) is calculated according to formula (1): Xi=m-(00-2)×100-Xs-X4
100-Xs
Where: m——mass of sample, g;
m1——mass of insoluble matter, g;
m2—mass of ignition residue of insoluble matter, g, X3——water content in sample, %
X—ash content of sample, %.
4.1.1.6 Allowable Difference
Take the arithmetic mean of the parallel determination results as the determination result. 2
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