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SN/T 1511.1-2005: Inspection of lactic acid in fruit juice for import and export
Status: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 1511.1-2005 | English | 519 |
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Inspection of lactic acid in fruit juice for import and export
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SN/T 1511.1-2005
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Basic data | Standard ID | SN/T 1511.1-2005 (SN/T1511.1-2005) | | Description (Translated English) | Inspection of lactic acid in fruit juice for import and export | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X50 | | Classification of International Standard | 67.160 | | Word Count Estimation | 13,173 | | 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 content of lactic acid in the juice sampling, sample preparation and gas chromatographic method. This standard applies to concentrated pineapple juice, apple juice, grape juice, orange juice, mango juice lactic acid content of the test. | SN/T 1511.1-2005: Inspection of lactic acid in fruit juice for import and export---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.
Inspection of lactic acid in fruit juice for import and export
Book of the People's Republic of China Entry and Exit Inspection and Quarantine
Method for testing lactic acid content in fruit juices for import and export
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. Hainan Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Zhang Weijun, Huang Huiling, Tao Wenqing, Jia Zemei, Lin Daoying.
This standard is the first industry standard for entry-exit inspection and quarantine.
Method for testing lactic acid content in fruit juices for import and export
1 Scope
This standard specifies the sampling, sample preparation and gas chromatographic determination methods for lactic acid content in fruit juice.
This standard applies to the determination of lactic acid content in concentrated pineapple juice, apple juice, grape juice, citrus juice and mango juice.
2 sampling and sample preparation
2.1 Inspection lot
Do not exceed 1000 pieces (or 25t) for one inspection lot.
Goods in the same inspection lot should have the same characteristics, such as packaging, marking, origin, specifications and grades.
2.2 Number of samples
The number of samples is shown in Table 1.
Table 1
Batch/piece minimum sample/piece
1~10 1
11~50 5
51～250 10
251~1000 15
2.3 Sampling method
Randomly sample the number of samples according to 2.2 and open them one by one. Take at least 500g of each sample as the original sample, the total amount of the original sample is not
Get less than 2kg. After the seal, mark the mark and send it to the laboratory in time. Samples should be protected from contamination or during sampling and sample preparation operations
A change in the content occurs.
2.4 Sample preparation
The sample taken was thoroughly mixed, and about 1 kg of a representative sample was taken out and divided into two portions and placed in a clean container as a sample. seal,
And mark the mark.
2.5 Sample storage
The sample was stored at 4 ° C to 10 ° C in the dark.
3 Determination method
3.1 Method summary
The lactic acid in the juice is derivatized with methanol-concentrated sulfuric acid, and after extraction with chloroform, the gas phase color with a hydrogen flame ionization detector is used.
Spectrometer determination, external standard method for quantification.
3.2 Reagents and materials
All reagents were of analytical grade and water was distilled water unless otherwise noted.
3.2.1 Concentrated sulfuric acid. excellent grade pure.
3.2.2 Trichloromethane. saturated with water.
3.2.3 Methanol. Chromatographically pure.
3.2.4 50% aqueous sulfuric acid solution.
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