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Determination on tannic value of activated carbon
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LY/T 1786-2008
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Basic data | Standard ID | LY/T 1786-2008 (LY/T1786-2008) | | Description (Translated English) | Determination on tannic value of activated carbon | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B72 | | Classification of International Standard | 65.050 | | Word Count Estimation | 8,859 | | Date of Issue | 2008-09-03 | | Date of Implementation | 2008-12-01 | | Quoted Standard | GB/T 6003.1-1997; GB/T 6682; GB/T 9721 | | Regulation (derived from) | Industry standard filing Notice No. 10 of 2008 | | Issuing agency(ies) | State Forestry Administration | | Summary | This standard specifies the activated carbon adsorption of tannic acid method. This standard applies to wood powdered activated carbon. | LY/T 1786-2008: Determination on tannic value of activated carbon---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination on tannic value of activated carbon
ICS 65.050
B72
People's Republic of China Forestry Industry Standard
Method for determining the adsorption value of activated carbon tannic acid
Released on.2008-09-03
2008-12-01 implementation
State Forestry Administration released
Foreword
Appendix A and Appendix B of this standard are informative annexes.
This standard is proposed and managed by the State Forestry Administration.
This standard was drafted. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry.
The main drafters of this standard. Dai Weijun, Sun Kang, Sun Yunjuan, Zhang Yanping, Chang Xia, Tong Yajuan.
Method for determining the adsorption value of activated carbon tannic acid
1 Scope
This standard specifies the method for determining the adsorption value of activated carbon tannin.
This standard applies to wood powdered activated carbon.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 6003.1-1997 Wire woven mesh test sieve (eqv ISO 3310-1.1990)
GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696.1987, MOD)
GB/T 9721 Chemical reagents - General rules for molecular absorption spectrophotometry (UV and visible light)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
The concentration of activated carbon required to reduce the tannic acid concentration from 20 mg/L to 2 mg/L in mg/L.
4 Determination of tannin adsorption value
Unless otherwise specified, the reagents used in this standard are of analytical grade, and the water used shall comply with the third grade water specified in GB/T 6682.
4.1 Method summary
A certain amount of activated carbon sample and tannic acid solution were stirred and adsorbed, filtered, and measured by visible spectrophotometer at 600 nm.
The filtrate absorbance, and the tannic acid concentration in the filtrate was found in the comparison of the tannic acid concentration and the solution absorbance. Calculate the unit concentration of activated carbon
The concentration of tannin acid adsorbed is X/M, and on the double logarithmic coordinates, X/M is taken as the ordinate and 犮 is plotted on the abscissa to make the adsorption isotherm of activated carbon.
Figure. The X/M value at the abscissa of 2 mg/L was found on the isotherm, and it was calculated that the tannin concentration was reduced from 20 mg/L to 2 mg/L.
The concentration of activated carbon is MT, which is the adsorption value of activated carbon tannin.
4.2 Instruments and conditions
4.2.1 Instruments
4.2.1.1 Visible spectrophotometer (GB/T 9721).
4.2.1.2 Balance. Accuracy 0.0001g.
4.2.1.3 Drying box. Temperature control accuracy ±1 °C.
4.2.1.4 Stirrer. Magnetic stirrer or electric mixer.
4.2.2 Conditions
The experimental environment temperature is 25 ° C ~ 30 ° C.
4.3 Reagents and solutions
4.3.1 Reagents
Standard sample of tannic acid. the content should not be lower than 99.0%.
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