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Detection of phytic acid in food for exprot. Calorimetric method
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Basic data
| Standard ID | SN/T 3635-2013 (SN/T3635-2013) |
| Description (Translated English) | Detection of phytic acid in food for exprot. Calorimetric method |
| Sector / Industry | Commodity Inspection Standard (Recommended) |
| Classification of Chinese Standard | X04 |
| Classification of International Standard | 67.50 |
| Word Count Estimation | 7,761 |
| Quoted Standard | GB/T 6682 |
| Regulation (derived from) | National quality recognition (2013), No. 464; industry standard filing Notice No. 1 of 2014 (No. 169 overall) |
| Issuing agency(ies) | General Administration of Customs |
| Summary | This standard specifies the use of ion exchange separation spectrophotometric method for the determination of phytic acid in foods. This standard applies to shrimp, determination ham, barbecue, fruit juice, fruit sugar, milk, fruit hung top of phytic acid |
SN/T 3635-2013: Detection of phytic acid in food for exprot. Calorimetric method
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Detection of phytic acid in food for exprot. Calorimetric method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Determination of phytic acid in food exports
Issued on. 2013-08-30
2014-03-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
Please note that some of the content of this document may involve patents. Distribution of this document
Institutions do not assume the responsibility to identify these patents.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. Tianjin People's Republic of China Exit Inspection and Quarantine.
The main drafters of this standard. Liu Yang, Wang Song, Chenqi Yong, Zhao Ting, Gebao Kun, Lin Anqing.
Determination of phytic acid in food exports
1 Scope
This standard specifies the use of ion exchange separation, spectrophotometric determination of import and export food phytic acid method.
This standard applies to the determination of shrimp, ham, barbecue, fruit juice, candy, powdered milk, canned fruits and other foods of phytic acid.
This method is low detection limit of 20mg/kg.
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, undated references, the latest edition (including any amendments) applies to this document.
Laboratory use specifications and test methods GB/T 6682 Analysis
3 Method summary
The samples were extracted with dilute hydrochloric acid and phytic acid ion, an anion exchange resin adsorption phytate and phytic acid, so that the inorganic phosphorus and salts thereof
And other impurities and elution with sodium chloride solution, eluent of phytic acid and ferric chloride - sulfosalicylic acid reaction mixture to produce fade, fade
Phytic acid content is proportional to the degree of absorbance was measured with a spectrophotometer at a wavelength of 500nm, the computing phytic acid content.
4 Reagents and materials
Unless otherwise stated, the methods used were of analytical grade reagents and water for the three water GB/T 6682 regulations.
4.1 Sodium hydroxide (NaOH).
4.2 Sodium chloride (NaCl).
4.3 hydrochloric acid (HCl).
4.4 ferric chloride (FeCl3 · 6H2O).
4.5 sulfosalicylic acid (G7H6O6S · 2H2O).
4.6 phytate (Na12C6H6O24P6, CAS number. 14306-25-3). purity of greater than or equal to 98.0%.
4.7 anion exchange resin (BIO-RAD). AG1-X4,100 mesh to 200 mesh.
4.8 Sodium hydroxide solution (20g/L). Weigh 2.0g of sodium hydroxide, dissolved in water and dilute to 100mL.
4.9 sodium chloride solution (0.7mol/L). Weigh 20.4g of sodium chloride dissolved in water and dilute to 500mL.
4.10 sodium chloride solution (0.04mol/L). Weigh 1.16g of sodium chloride dissolved in water and dilute to 500mL.
4.11 hydrochloric acid extract (content. 0.5%). lessons 6.75mL of concentrated hydrochloric acid (37% by mass fraction meter), dissolved in water and diluted to
500mL.
4.12 Ferric chloride - sulfosalicylic acid reaction solution. Weigh 1.35g ferric chloride and 1.28g sulfosalicylic acid, dissolved in water and dilute to
500mL. Prior to use, diluted with water five times.
4.13 phytic acid standard stock solution (1.0mg/mL). Weigh accurately phytate standard (purity 98.0% by count) 0.7141g, dissolved in water
And set the volume to 500mL, dark at 4 ℃, stable two months.
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