HG/T 2879.6-1997 Determination of total manganese content in rubber compound clay HG/T2879.6-1997 Standard download decompression password: www.bzxz.net

HG / T 2879. 6 - 1997
This standard is a test method standard, equivalent to the international standard IS0 5795-1:1988 "Rubber Compounds-Clay" Part 1 Appendix E (Determination of total manganese content-Atomic absorption spectrometry), the main technical differences between this standard and ISO5795-1:1988: This standard adds three chapters: scope, reference standards, and test report. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Carbon Black Industry Research and Design Institute of the Ministry of Chemical Industry; this standard is drafted by the Carbon Black Industry Research and Design Institute of the Ministry of Chemical Industry; the main drafters of this standard are Xue Lei, Hu Kaibi, Yu Lian, HG/T2879.6-1997. ISO Foreword ISO (International Organization for Standardization) is a worldwide federation of national standard bodies (ISO member bodies): the work of formulating international standards is usually carried out by ISO technical committees. Any member body interested in the basic profession of the established technical committee has the right to participate in the committee. International organizations of governmental or non-governmental organizations that have relations with ISO may also participate in this work. In all electrical technical standards, ISO works closely with the International Electrotechnical Commission (IEC). Before the ISO Council adopts an international standard, the technical committee sends the draft international standard to each member group for voting. According to the ISO requirement, at least 75% of the member groups must vote in favor before it can be formally adopted. The international standard ISO5795-1 was developed by the ISO/TC45 Technical Committee for Standardization of Rubber and Rubber Products ISO5795. The general standard is entitled Rubber Compounds - Clay, which includes the following three parts: Part 1: Test methods (non-rubber tests) Part 2: Rubber tests Part 3: Technical conditions Appendices A to F are components of ISO5795, and the first edition was published in 1988.
ICS83. 040. 20
Registration No. 456--1997
Chemical Industry Standard of the People's Republic of China
Rubber Compounding ingredients-kaolinclay-Determination of total manganese content1Scope
HG /T 2879.6—1997
q1SO5795—1:1988
1.1 This standard specifies the determination of the total manganese content of rubber compounding clay by atomic absorption spectrometry. 1.2 This standard is applicable to the determination of the total manganese content of natural clay in rubber compounds and can also be used for the determination of the total manganese content of other industrial natural clays.
1.3 This standard applies to the determination of total manganese content in natural clay that has been chemically treated with acid neutralizing substances (such as amines) during the production process.
1.4 This standard does not apply to the determination of total manganese content in natural clay that has been surface modified (such as silane treatment). 1.5 This standard does not apply to the determination of total manganese content in natural clay that has been calcined. 2 Referenced standards
The following standards contain provisions that 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. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T6682-92 Specifications and test methods for water for analytical laboratories (egyISO3696:1987) HG/T2879.I—1997 Determination of total clay content in rubber compounding (egVISO5795-1:1988) 3 Principle
Treat the clay sample with perchloric acid and hydrofluoric acid to dissolve most of the sample. Then use sodium carbonate to melt the insoluble matter, mix the melt with the acid-treated solution to obtain an overall solution, and determine the total manganese content of the sample by atomic absorption spectrometry at a wavelength of 279nm. Reagents
All reagents are analytically pure, and the test water conforms to the provisions of GB/T6682. 4.1 Nitric acid p=1.42Mg/m2,
4.2 Manganese standard stock solution: 1000mg/dm Dissolve (1.000±0.001)g of high-purity oxygen-free manganese metal in a beaker containing 50cm2 of water and 5cm2 of nitric acid (4.1), boil to exclude ammonia oxide, then cool and transfer to a 1000cm2 volumetric flask, dilute to the scale with water, shake well, and 1 cm This standard solution contains 1 000μg manganese. 4.3 Manganese standard solution: 50 mg/dm2
Use a pipette to transfer 50.0 cm2 of the standard solution (4.2) into a 1000 cm2 volumetric flask, add 50 cm2 of nitric acid, then dilute to the mark with water and shake to check
1 cm2 of this standard solution contains 50 mg/dm2 of manganese.
4.4 Manganese standard solution: 10 mg/dm
Approved by the Ministry of Chemical Industry of the People's Republic of China on April 21, 1997 and implemented on October 1, 1997
HG / T 2879. 6 -- 1997bZxz.net
Use a pipette to transfer 50.0 cm2 of the manganese standard solution (4.3) into a 250 cm2 volumetric flask, add 1 cm2 of nitric acid (4.1), then dilute to the mark with water and shake to check
1 cm2 of this standard solution contains 10 g manganese,
5 Instruments
Conventional laboratory instruments and
Atomic absorption spectrometer with manganese lamp
6 Steps
6. 1 Test solution
The test solution reserved in 7.2.4 of HG/T2879.1-1997 is used as this test solution. 6.2 Drawing of standard curve
6.2.1 Use a pipette to draw 0.5 cm3, 2.5 cm, 5.0 cm2, 10.0 cm2, 15.0 cm3 and 25.0 cm2 of manganese standard solution (4.4) respectively into a set of six 50 cm2 volumetric flasks, dilute to the mark with water and shake well. The calcium concentrations in each flask are 0.1 μg/cm, 0.5 μg/cm*, 1.0 μg/cm, 2.0 μg/cm3, 3.0 μg/cm* and 5.0 μg/cm respectively. 6.2.2 According to the instrument manufacturer's instruction manual, adjust the atomic absorption spectrometer (5.1) and use air/acetylene flame to measure the concentration of calcium at a wavelength of 279 ℃. Prepare the absorbance of the standard solution. 6.2.3 Inject the above series of standard solutions into the atomic absorption spectrometer in turn and measure their absorbances respectively. After measuring each standard solution, inject water into the flame to wash the system.
6.2.4 Use the concentration of the manganese standard solution (ug/cm3) as the horizontal axis and its corresponding absorbance as the vertical axis to draw a standard curve. 6.3 Measurement
6.3.1 Cross-absorb the test solution and water as in 6.2.3. Test twice and record the average of the absorbance values. 6.3.2 Find the manganese concentration of the test solution corresponding to the average absorbance value from the standard curve (6.2.4) and express it in g/cm. 6.4 Blank test
The blank test is carried out according to the above steps (6), but not the sample. 7 Expression of results
The total manganese content of the sample is calculated as follows, mg/kge(Mal \-e(Ma)4
Wherein: e(Ma)3—-manganese content in the sample, μg/cm; e(ma)——manganese content in the blank test, μg/cm;×100
The mass of the sample (7.1 in HG/T2879.1), gm
8 Test report
The test report should include the following items:
The standard number on which the test is based;
The complete number and origin of the sample;
Test results;
Record any abnormal phenomena that occurred during the test;
Test date.
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