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GB/T 34271-2017: Determination of saponification value of oils in feeds
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| GB/T 34271-2017 | English | 109 |
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Determination of saponification value of oils in feeds
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GB/T 34271-2017
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Basic data | Standard ID | GB/T 34271-2017 (GB/T34271-2017) | | Description (Translated English) | Determination of saponification value of oils in feeds | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B46 | | Word Count Estimation | 5,558 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-04-01 | | 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 | GB/T 34271-2017: Determination of saponification value of oils in feeds---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.
Determination of saponification value of oils in feeds
ICS 65.120
B46
National Standards of People's Republic of China
Determination of saponification value of fats and oils in feedstuffs
2017-09-07 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed and managed by the National Feed Industry Standardization Technical Committee (SAC/TC76).
This standard drafting unit. Shanghai Academy of Agricultural Sciences Agricultural Products Quality Standards and Testing Institute, Guangdong Hengxing Feed Industry Co., Ltd.
Limited, Guangzhou Branch days Technology Co., Ltd., Shanghai Feed Quality Supervision and Inspection Station.
The main drafters of this standard.Zhao Zhihui, Lin Miao, Yang Junhua, Yang Haifeng, Gu Saihong, Wang Hongmei, Han Wei.
Determination of saponification value of fats and oils in feedstuffs
1 Scope
This standard specifies the method of determination of saponification value of the feed oil.
This standard applies to feed, feed and feed concentrate feedstuff saponification value determination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 601 chemical reagent standard titration solution preparation
GB/T 6433 feed fat in the determination
GB/T 6682 analytical laboratory water specifications and test methods
GB/T 14699.1 feed sampling
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Saponification value saponificationvalue
Millions of potassium hydroxide required to saponify the fat contained in 1 g of feed under specified conditions.
4 principle
Oil samples were extracted with petroleum ether, and the oil was saponified by boiling with potassium hydroxide-ethanol solution under reflux conditions. Alkalinity
Blue 6B as an indicator, with hydrochloric acid standard solution titration excess potassium hydroxide.
5 Reagents and materials
Unless otherwise specified, use only reagents that are identified as analytically pure in the analysis and grade 3 water that meets the requirements of GB/T 6682.
5.1 petroleum ether boiling range 30 ℃ ~ 60 ℃.
5.2 Emery or glass beads.
5.3 Ethanol .95%.
5.4 Potassium hydroxide - ethanol solution (0.05mol/L). Weigh 2g of potassium hydroxide, placed in a polyethylene container, with 1000mL95% ethanol
(5.3) dissolved, closed for 24h. The supernatant was taken to another polyethylene container.
5.5 hydrochloric acid standard solution Ⅰ.c (HCl) = 0.5mol/L, prepared and calibrated according to GB/T 601.
5.6 hydrochloric acid standard solution Ⅱ.c (HCl) = 0.05mol/L, accurately remove 100mL hydrochloric acid standard solution Ⅰ (5.5), the water boiled 15min
After cooling, use this non-carbon dioxide water to volume 1000mL, now with the current use.
5.7 Basic Blue 6B indicator (20 g/L) Weigh 2 g of Basic Blue 6B in 100 mL of 95% ethanol (5.3).
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