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Animal and vegetable oils and fats for export. Part 24: Determination of water content. Karl Fischer method
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SN/T 0801.24-2011
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Basic data | Standard ID | SN/T 0801.24-2011 (SN/T0801.24-2011) | | Description (Translated English) | Animal and vegetable oils and fats for export. Part 24: Determination of water content. Karl Fischer method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | C53 | | Word Count Estimation | 10,196 | | Date of Issue | 2011-09-09 | | Date of Implementation | 2012-04-01 | | Quoted Standard | GB/T 6682; GB/T 15687; SN/T 0800.1 | | Adopted Standard | ISO 8534-1996, MOD | | Regulation (derived from) | National Quality Inspection (2011) 492; industry standard filing Notice 2012 No. 4 (No. 148 overall) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the import and export of animal fats moisture measurement method (Karl Fischer method). This standard applies to the determination of moisture in animal fats, lifting capacity titration method for the arbitration. | SN/T 0801.24-2011: Animal and vegetable oils and fats for export. Part 24: Determination of water content. Karl Fischer method
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Animal and vegetable oils and fats for export Part 24. Determination of water content Karl Fischer method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Exports of animal fats - Part 24. Moisture
Determination Karl Fischer method
Part 24. Determinationofwatercontent-KarlFischermethod
(ISO 8534.1996, Animalandvegetablefatsandoils-
Determinationofwatercontent-KarlFischermethod, MOD)
Issued on. 2011-09-09
2012-04-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
SN/T 0801 "export animal fat" is divided into 24 sections.
--- Part 1. Test method of insoluble impurities;
--- Part 2. phosphorus testing methods;
--- Part 3. peroxide value test method;
--- Part 4. Washer off the heating test testing methods;
--- Part 5. Test methods melting point;
--- Part 6. Determination of sediment;
--- Part 7. Test insoluble bromide;
--- Part 8. the proportion of test methods;
--- Part 9. transparency, smell, taste testing methods;
--- Part 10. cloud point test methods;
--- Part 11. Oil foot test methods;
--- Part 12. Flash Point Limits Test Pensky - Martens closed cup method;
--- Part 13. Test method for drying time;
--- Part 14. color test methods;
--- Part 15. unsaponifiables test methods;
--- Part 16. Test method phosphoric acid test value;
--- Part 17. fatty acid freezing point test method;
Moisture and volatile matter test methods;. --- Part 18
--- Part 19. free fatty acid value and test methods;
--- Part 20. hydroxyl value testing methods;
--- Part 21. Chlorophyll test methods;
--- Part 22. polyvinyl-based polymer testing methods;
--- Part 23. Inspection of residual solvent;
--- Part 24. Determination of moisture content Karl Fischer method.
This section SN/T 0801 of Part 24.
This section drafted in accordance with GB/T 1.1-2009 given rules.
The partial modification of the use of ISO 8534.1996 "Determination of animal fat water Karl Fischer method."
This part of ISO 8534.1996 as compared to, technical differences are as follows.
--- 5.1 in the solvent by the "ethylene glycol methyl ether, n-propanol, or other specific solvents" to "methanol and chloroform (12 or
13);
--- 5.2 Karl Fischer reagent added imidazole type pyridine free Karl Fischer reagent;
--- 9.2 adds the weighing method described, "to ensure that the sample contains 1mg ~ 100mg of water. When the water content of the sample is too
High or too low, you can adjust the quality of the sample. Shake the liquid sample direct sampling; solid sample is heated to melting (melting
After the sample temperature of the sample shall not exceed the melting point of 10 ℃), shake and then sampled. "
These technical differences identified in a single vertical line they involved provisions margin.
For ease of use, this section also made the following editorial changes.
--- The ISO 8534 in the "international standards" to "this Part";
--- Deleted international standards foreword;
--- Normative references ISO standard will modify the corresponding national standards or industry standard for entry-exit inspection and quarantine;
--- 1 Scope Delete the text "containing a fatty acid salt or the other may be Karl Fischer reagent of basic impurities oil
Fat, high test results ";
--- 4 Principle part of the increase chemical reaction equations and text;
--- 5.2 Delete footnote 1 "according to ISO 8534.1996 user confirmation, a non-pyridine Karl Fischer reagent
Hydranal-composite2 animal and vegetable oils can be used to determine the moisture. The reagent is prepared from iodine, sulfur dioxide and amine together,
Can, Seelze/Hannover, 3016Germany purchased from Riedel-deHaënAG. This information is not part of the present standard
Quasi-part ";
--- Deleted 6.1 and 9.1 of the semi-automatic titrator and visually determine the contents of the titration end point;
--- Analytical balance increased by 6.2 and 6.3 syringe;
--- 9.2 Added Note content;
--- 9.4 adds formulas titer;
--- 12 test reports and delete the contents of Appendix D references.
Please note that some of the content of this document may involve certain patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.
This section proposed and managed by the National Certification and Accreditation Administration Committee.
This section was drafted by. People's Republic of China Shanghai Entry-Exit Inspection and Quarantine Bureau.
The main drafters of this section. Zhang Jidong, Chen Yun, the Zhang Kai, Zhang Lin.
Exports of animal fats - Part 24. Moisture
Determination Karl Fischer method
Warning. pyridine, methanol, chloroform, sulfur dioxide are toxic, so when analyzing or dealing with these agents should be particularly careful. for
Protect the environment and ensure the health of workers, these agents should be used in strict compliance with relevant laws and regulations.
1 Scope
SN/T 0801 This section specifies the method for determination of the import and export of animal fat water (Karl Fischer method).
This section applies to the determination of moisture in animal and plant oils, including capacity arbitration titration method.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 15687 animal and plant oils prepared sample (GB/T 15687-2008, ISO 661.2003, IDT)
SN/T 0800.1 and export grain, feed inspection sampling and sample preparation methods
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Water watercontent
In accordance with the ratio of the mass of the sample quality of sample measured as specified in this part of the water in order to represent the mass fraction.
4 Method summary
Adding a certain amount of grease sample in a solvent, after fully dissolve in Karl Fischer reagent titration and calculate the moisture content of the sample.
In the presence of water in the case of Karl Fischer reagent of sulfur dioxide (SO2) is iodine (I2) oxidation, chemical reaction equation is as follows.
H2O I2 SO2 CH3O → 3RN [RNH] SO4CH3 2 [RNH] I
Methanol and sulfur dioxide and nitrogen-containing bases (RN) reaction intermediates alkaline sulfite, alkali sulfite intermediates continue to be oxygen-iodine
Generation of alkaline sulfates, animal fats consumed in the reaction in the sample water, while the reaction was monitored by potentiometric method end.
5 Reagents
All reagents were of analytical grade unless otherwise specified. Test water for the two water or equivalent purity water GB/T 6682 regulations.
5.1 solvent. chloroform methanol (12 or 13).
5.2 Karl Fischer reagent. for volumetric titration of pyridine-containing Karl Fischer reagent without pyridine or imidazole-based Karl Fischer reagents.
Day of use calibration Karl Fischer reagent titer.
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