|
US$199.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 22427.9-2008: Starch and derived products -- Determination of acidity
Status: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 22427.9-2008 | English | 199 |
Add to Cart
|
2 days [Need to translate]
|
Starch and derived products -- Determination of acidity
| Obsolete |
GB/T 22427.9-2008
|
PDF similar to GB/T 22427.9-2008
Basic data | Standard ID | GB/T 22427.9-2008 (GB/T22427.9-2008) | | Description (Translated English) | Starch and derived products -- Determination of acidity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X11 | | Classification of International Standard | 67.180.20 | | Word Count Estimation | 5,513 | | Date of Issue | 2008-10-19 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | GB/T 12090-1989 | | Regulation (derived from) | National Standard Approval Announcement 2008 No.17 (Total No.130) | | Issuing agency(ies) |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 method for the determination of starch and its derivatives titration acidity. This standard applies to the determination of starch and its derivatives acidity. | GB/T 22427.9-2008: Starch and derived products -- Determination of acidity---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.
Starch and derived products. Determination of acidity
ICS 67.180.20
X11
National Standards of People's Republic of China
Replacing GB/T 12090-1989
Acidity of starch and its derivatives
Posted.2008-10-19
2009-03-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard replaces GB/T 12090-1989 "Determination of acidity of starch and its derivatives."
This standard and GB/T 12090-1989 compared to the main changes are as follows.
--- Standard name changed to "Determination of acidity of starch and its derivatives";
--- This standard expanded the scope of application, canceled "does not apply to acidity does not exceed 12mL of starch and its derivatives" restrictions;
--- Standardized testing methods. an increase of the blank sample acidity determination, eliminating the impact of distilled water on the sample acidity;
--- Improve the standard format, according to the norms of the system of units of the International System;
--- Added "8 experimental report."
This standard is proposed and managed by the China Chamber of Commerce.
This standard was drafted. Commercial Standards Center of China Chamber of Commerce, Food Science Institute of Jiangnan University, China Starch Industry Association modified starch
Professional Committee, Shandong Zhucheng Xingmao Corn Development Co., Ltd., Guangxi Wuming Anning Starch Co., Ltd. liability company.
The main drafters of this standard. Guzheng Biao, Hong Yan, Cheng Li, Zhou Zhiguo, Cen Xi, Jin Xiaolei.
Acidity of starch and its derivatives
1 Scope
This standard specifies the titration method for the determination of acidity of starch and its derivatives.
This standard applies to the determination of acidity of starch and its derivatives.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Titrate the volume of sodium hydroxide standard solution consumed by the sample emulsion.
3 principle
Titrate the starch emulsion with sodium hydroxide standard until neutral.
4 reagent
Analytical reagents and distilled water or equivalent purity water should be used.
4.1 sodium hydroxide standard solution. 犮 = 0.1mol/L, to be calibrated.
4.2 potassium hydrogen phthalate. reference reagent.
4.3 phenolphthalein indicator. 1g phenolphthalein dissolved in 100mL95% (volume fraction) of ethanol.
5 instruments
5.1 Erlenmeyer flask. 250mL.
5.2 burette. capacity 10mL, 25mL.
5.3 Analytical Balance. Feel 0.1g.
5.4 Analytical Balance. Feel 0.0001g.
5.5 magnetic stirrer.
5.6 electric thermostat blast oven. Temperature can be controlled at 110 ℃ ± 1 ℃.
5.7 Dryer. There is a well-functioning desiccant and a thick perforated plate.
6 operation process
6.1 Sample Preparation
Samples should be fully mixed.
6.2 Weigh
Weigh the sample (6.1) 10g, accurate to 0.1g, into 250mL conical flask (5.1), add 100mL of distilled water, shaken and mixed
Evenly.
6.3 titration
Add 2 drops to 3 drops of phenolphthalein indicator (4.3) in a conical flask and stir on a magnetic stirrer (5.5).
Titration with calibrated sodium hydroxide standard solution (4.1), until the conical flask appears just pink, and do not fade within 30s, read
Consumption of sodium hydroxide standard solution ml (犞 1).
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 22427.9-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 22427.9-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 22427.9-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22427.9-2008_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.
|