This standard specifies the rapid determination method of the transmittance of carbon black toluene extract using a spectrophotometer. This standard is applicable to the rapid determination of the transmittance of carbon black toluene extract for rubber. GB/T 3780.15-1997 Rapid determination method of the transmittance of carbon black toluene extract for rubber GB/T3780.15-1997 Standard download decompression password: www.bzxz.net

GB/T 3780.15:1997 This standard is the test method standard for carbon black for rubber. It is revised according to the international standard ISO38581:1990i Carbon black for rubber - Toluene extract - Rapid method for determination of light transmittance of carbon black extract - Part 1: Rapid method. This standard adopts the international standard ISO38551:1990. The main differences between this technical standard and GR/T 3780.15 are as follows: 1. Added the foreword and ISO foreword, 2. Added the introduction to Chapter 2, and noted the year of the referenced standard. The number of referenced standards increased from 1 to 3. 3. Added 6.1 Sampling. 4. Chapter 9 The amendment rules for the measurement results are added in the competition. This standard shall replace GB3/3780.15-1997 from the date of entry into force. This standard is issued by the Carbon Black Industry Research and Design Institute of the Ministry of Chemical Industry of the People's Republic of China. This standard was issued by the Carbon Black Industry Research and Design Institute of the Ministry of Chemical Industry. The author of this standard is: Hu πzun, Yu Lian, Xue Sa. This standard was first issued in June 1983 and revised for the first time in April 1988. GB/1 3780.15-1997
ISO (International Organization for Standardization) is a worldwide body of national standards (ISO) composed of organizations that work on the preparation of international standards through technical committees (TS). Any member body interested in a subject of an established technical committee has the right to participate in the committee. International organizations, governmental or non-governmental, in contact with ISO, may also participate in this cooperation. 1SO collaborates closely with the International Committee (EC) on electrotechnical standardization issues. Draft international standards adopted by the technical committees shall be circulated to the member bodies for approval before they are approved as international standards by the ISO/TC Council. According to the ISO procedure, at least 7* of the member bodies shall vote in favor before they are adopted (adoption is deemed to be adopted). International Standard IS3858-1 was prepared by ISO/TC45 Committee on Rubber and Rubber Products. The third edition of this version is a revision of the previous version and cancels and replaces the second edition (IS0) 3858-1: 1983). The general title of IS3858 is Carbon black for use in rubber - Part 1: Rapid method - Part 2: Product evaluation method - Determination of light transmittance of toluene extracts", which includes the following parts: 1 Scope National Standard of the People's Republic of China Carbon black for rubber - Rapid method for determination of light transmittance of toluene extract melhod
CB/T 3780.15—1997
Idlt IS0 3858-1:1990
Replaces GB/T 378c-1:S8
This standard specifies the rapid determination method of the light transmittance of fluorescent black extracts by spectrophotometer. This standard is suitable for the rapid determination of the light transmittance of carbon black extracts for rubber. 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 reprinted, the number of copies shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards CB3778--94 Carbon black for rubber liquid
GB/T3780.S92 Determination of carbon black heating reduction (NerJS (1126: 85) GH/T8170: 87 Numerical rounding plan
3 Principle
Weigh a certain amount of dry carbon black sample, mix it with a certain volume of toluene at room temperature, filter the mixture, transfer the filtrate into a trough, and use a spectrophotometer to measure the filter transmittance at a given wavelength with toluene as blank. 4 Reagents
Toluene: pure.
5 Instruments
5.1 Analytical balance: accurate to 0.01 g
5.2 Temperature dry box: can be controlled at 105 (-2℃5.3 Spectrophotometer: wavelength 3601m-60gnm, accuracy 13nm, transmittance can be directly read at 425nm wavelength, supply voltage change is greater than 1V, a voltage stabilizer is required.
Note: Be careful that the half width of the colorimeter light step is too large, when used, it can be compared with the separation line of 433nm2nra to be measured. 5.4 Colorimetric slot: the flatness of the polished surface should be within 10nm, the internal distance (i.e. optical path) of the parallel reading is 10.00mm±(1.15sr Note
1 The total length of the test ni is (0.00m+0.05 When the shape of the color is 10 mm, it must be compared with the colorimetric film to make a correction. 2 When the negative light is not extended to 1 cm, the following formula is used to convert it into the transmittance of the colorimetric with an optical path of 10 mm. State Technical Supervision Bureau 1997 09:26 Approved 1998040: Implementation
GB/T 3780. 15
Ir=×igr
Comparison of the transmittance of the colorimetric with an optical path of 1 mm:
… The transmittance of the colorimetric with an optical path of L,
Verify the optical path of the colorimetric film,
! The transmittance of the colorimetric film may not be the same. This standard recommends that a colorimetric file be used to adjust the spectrophotometer for actual testing. 5.5 The diameter of the bottle is 100 cm or 123 cm. 5.6± quotient: diameter ±59 cm, the minimum division is 1 cm5.7 Test tube: volume is 50 cm.
5.8 Slide bucket: diameter 7 nm made of chemically corroded glass or 5.9 Filter: diameter 150 mm, not containing evenly osmotic substances, non-transparent filter carbon black: 5.10 Optical thin film: no cotton, embedded,
6 Sample preparation
6.1 Take carbon black sample according to the provisions of 6.2 in G133778. 6.2 Weigh 1g. Dry at 105℃2C for 2h according to the provisions of B/T3780.8, cool to room temperature in a desiccator for use, Note: Carbon black can be dried at a certain temperature, and infrared lamps cannot be used for drying, because some related substances may develop at higher temperatures and the results are not satisfactory. Granular carbon black should be evaluated
7 Test conditions wwW.bzxz.Net
The test temperature should be 23℃~2℃, relative humidity The test is carried out under the conditions of 50°C + 5°C or room temperature of 27-2°C and relative humidity of 65%-5%. The reagents and the test apparatus are allowed to reach the ambient temperature before the test. Methyl alcohol is flammable and inflammable. The test is carried out in a ventilated cabinet. The electrical equipment or machines used must be explosion-proof. No nicotinic acid that may affect the test results is allowed to be present in the cabinet. 8 Steps 8.1 Before the spectrophotometer (5.3), preheat for at least 10 mils. Filter about 50 μm of methyl alcohol (4.1) into a test tube (5.7). Use this filter to clear the color. Wipe the filter with a piece of silk. Fill the colorimetric tank with filtered toluene, wipe the color wall with a piece of silk and place it in the spectrophotometer. Adjust the spectrophotometer to indicate a pure transmittance of 100 nm at a wavelength of 425 nm. 8.2 Weigh or place 3 g to 0.01 g of carbon black sample in a flask (5.5). For a larger volume than the sample, more samples can be added. For every 1g of carbon, an additional 8.3 g of carbon is required. Take some filtered toluene at 30 cm + 0.5 rm and inject it into the diaphragm containing the sample (8. 2. 8.4 Mix the carbon black liquid in 3# benzene. Shake 138~558.5 stirring layer to 3, filter the mixture into another test tube (5.7). Use new filter paper to filter each sample, and do not allow the filter paper to be reused. ||tt| ... The test report shall include the following contents: a) Standard method number adopted; b) Complete terminal number of the sample; c) Spectrophotometer model; d) Test results; d) Test date, GB/T3780.15—1997
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