|
US$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 5521-2008: Inspection of grain and oils -- Determination of alpha-amylase activity in cereal and cereal products -- Colorimetric method
Status: Valid GB/T 5521: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5521-2008 | English | 209 |
Add to Cart
|
3 days [Need to translate]
|
Inspection of grain and oils -- Determination of alpha-amylase activity in cereal and cereal products -- Colorimetric method
| Valid |
GB/T 5521-2008
|
| GB/T 5521-1989 | English | 199 |
Add to Cart
|
2 days [Need to translate]
|
Method for determination of alpha-amylase activity in cereal and cereal products - Colorimetric method
| Obsolete |
GB/T 5521-1989
|
PDF similar to GB/T 5521-2008
Basic data | Standard ID | GB/T 5521-2008 (GB/T5521-2008) | | Description (Translated English) | Inspection of grain and oils -- Determination of alpha-amylase activity in cereal and cereal products -- Colorimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.040 | | Word Count Estimation | 9,948 | | Date of Issue | 2008-11-04 | | Date of Implementation | 2009-01-01 | | Older Standard (superseded by this standard) | GB/T 5521-1989 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.17 (Total No.130) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the colorimetric determination of grain and products of ��- amylase activity of terms and definitions, principle, reagents and materials, instrument, steps, calculated results, precision and test reports. This standard applies to the determination of cereals and cereal products ��- amylase activity, can also be used to determine from fungal and bacterial ��- amylase activity of powder. | GB/T 5521-2008: Inspection of grain and oils -- Determination of alpha-amylase activity in cereal and cereal products -- Colorimetric method
---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 grain and oils. Determination of alpha-amylase activity in cereal and cereal products. Colorimetric method
ICS 67.040
B20
National Standards of People's Republic of China
Replacing GB/T 5521-1989
Inspection of grain and grain products α- amylase
Colorimetric Determination of Activity
Posted 2008-11-04
2009-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is GB/T 5521-1989 "cereals and cereal products α- amylase activity measuring method" of amendments.
This standard replaces GB/T 5521-1989.
This standard compared with GB/T 5521-1989 The main changes are as follows.
--- Increasing the normative references;
--- Terminology and definitions have been modified;
--- Increased test reporting requirements;
--- Will be calculated by the body adjusted to the appendix for example, as an information appendix.
Appendix A of this standard is an informative annex.
The standard proposed by the National Food Authority.
This standard by the National Standardization Technical Committee OILS.
This standard was drafted. Nanjing University of Finance and Economics.
The main drafters of this standard. OILS, Wang Suya, Yuan Jian, Yang Huiping.
This standard replaces the standards previously issued as follows.
--- GB/T 5521-1985, GB/T 5521-1989.
Inspection of grain and grain products α- amylase
Colorimetric Determination of Activity
1 Scope
This standard specifies the colorimetry and cereal products α- amylase activity terms and definitions, principles, reagents and materials, equipment, operation
Procedures, calculation results, precision and test reports.
This standard applies to the determination of cereals and cereal products α- amylase activity can also be used to determine derived from fungi and bacteria α- amylase powder
Activity.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to this part of the research agreement
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Β- amylase can be completely degraded starch product.
3.2
Samples extracted from 1g enzyme 1L solvent, under specified conditions, the degradation of β- limit dextrin substrate per 1.024 × 10-5 units
Solution, α- amylase activity of the sample as a unit.
Principle 4
α- β- amylase degradation limit dextrin substrate solution, the enzymatic reaction process, respectively, at different times aliquots of the reaction mixture was added iodine
Solution. With the reaction time, the reaction mixture of iodine and reduce color intensity to determine enzyme activity.
5 Reagents and materials
Unless otherwise indicated, the reagents used were of analytical grade. Test water line with GB/T 6682 in the three water requirements.
5.1 iodine.
5.2 potassium iodide.
5.3 calcium chloride.
5.4 anhydrous sodium acetate.
5.5 sulfuric acid.
5.6 glacial acetic acid.
5.7 soluble starch.
NOTE. to use Lintner starch or of comparable quality domestic soluble starch.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 5521-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 5521-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 5521-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 5521-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 5521-2008?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 5521-2008 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|