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SN/T 1548-2005: Benzoic acid, sorbic acid test method in the import and export of fermented bean curd
Status: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 1548-2005 | English | 279 |
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Benzoic acid, sorbic acid test method in the import and export of fermented bean curd
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SN/T 1548-2005
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Basic data | Standard ID | SN/T 1548-2005 (SN/T1548-2005) | | Description (Translated English) | Benzoic acid, sorbic acid test method in the import and export of fermented bean curd | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X11 | | Classification of International Standard | 67.060 | | Word Count Estimation | 7,767 | | Date of Issue | 2005-02-17 | | Date of Implementation | 2005-07-01 | | Regulation (derived from) | Industry standard filing Notice 2005 No. 4 (No. 64 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China | | Summary | This standard specifies the import and export of fermented bean curd in benzoic acid, sorbic acid content of the test sample, sample preparation and liquid chromatographic method. This standard applies to imports and fermented bean curd in sorbic acid content of the test. | SN/T 1548-2005: Benzoic acid, sorbic acid test method in the import and export of fermented bean curd
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Benzoic acid, sorbic acid test method in the import and export of fermented bean curd
Book of the People's Republic of China Entry and Exit Inspection and Quarantine
Import and export of benzoic acid and sorbic acid in fermented bean curd
Testing method
Released on.2005-02-17
2005-07-01 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
Appendix A of this standard is an informative annex.
This standard is proposed and managed by the National Certification and Accreditation Administration.
This standard was drafted. Zhejiang Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Chen Xiaomei, Shi Xuxia, Shan Huijun, Chi Haochao.
This standard is the first industry standard for entry-exit inspection and quarantine.
Import and export of benzoic acid and sorbic acid in fermented bean curd
Testing method
1 Scope
This standard specifies the sampling, sample preparation and liquid chromatographic methods for the determination of benzoic acid and sorbic acid in imported and exported fermented bean curd.
This standard applies to the test of benzoic acid and sorbic acid content in the import and export of fermented bean curd.
2 sampling and sample preparation
2.1 Inspection lot
Take the inspection batch as an inspection lot. Products of the same inspection lot should have the same characteristics, such as packaging, marking, origin, production lot number and
grade.
2.2 Number of samples
The number of samples is shown in Table 1.
Table 1 The sampling quantity unit is the tank (bottle)
Minimum number of samples in batch
≤50 2
51～500 3
501~35000 5
≥35000 8
2.3 Sampling method
The number of sampling tanks specified in 2.2 is randomly selected and opened one by one. Mark the mark and send it to the laboratory in time.
If the mass of each can (bottle) exceeds 2kg, it can be taken in a can of not less than 500g in each can (bottle), mixed and placed in a clean container.
To mix the original sample. The quality of the mixed original sample is not less than 2kg. After the seal, mark it and send it to the laboratory in time.
2.4 Sample preparation
The extracted samples were thoroughly mixed and divided into two portions and placed in a clean container. One sample for testing. another serving
Leave the sample and store at 4 ° C. Samples should be protected from contamination or changes in content during sampling and sample preparation operations.
3 Determination method
3.1 Method summary
After the sample was precipitated by ammonium chloride solution and dilute phosphoric acid, the filtrate was passed through a Sep-pak activated carbon column and rinsed with 10% acetone solution.
The acetone was eluted, the eluate was concentrated, and the mobile phase was fixed. HPLC analysis at 230 nm wavelength was performed by external standard method.
3.2 Reagents and materials
Unless otherwise specified, the reagents were of analytical grade and the water was ultrapure water.
3.2.1 Methanol. Liquid chromatography grade reagent.
3.2.2 Phosphoric acid. ≥ 85%.
3.2.3 Condensate. 5 g of ammonium chloride and 10 mL of phosphoric acid are dissolved in 1000 mL of distilled water.
3.2.4 Acetone.
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