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GB/T 17776-2016: Determination of sulfur in feedstuff -- Magnesium nitrate method
Status: Valid GB/T 17776: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 17776-2016 | English | 119 |
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Determination of sulfur in feedstuff -- Magnesium nitrate method
| Valid |
GB/T 17776-2016
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| GB/T 17776-1999 | English | 199 |
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Determination of sulfur in feedstuff. Magnesium nitrate method
| Obsolete |
GB/T 17776-1999
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PDF similar to GB/T 17776-2016
Basic data | Standard ID | GB/T 17776-2016 (GB/T17776-2016) | | Description (Translated English) | Determination of sulfur in feedstuff -- Magnesium nitrate method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B46 | | Classification of International Standard | 65.120 | | Word Count Estimation | 6,638 | | Date of Issue | 6/14/2016 | | Date of Implementation | 2017-01-01 | | Older Standard (superseded by this standard) | GB/T 17776-1999 | | Quoted Standard | GB/T 6682; GB/T 14699.1; GB/T 20195 | | Regulation (derived from) | National Standard Announcement No. 8 of 2016 | | 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 determination of sulfur in feed. This standard applies to a single feed, with feed, concentrate feed and concentrate supplement. The quantitative limit of this standard is 0.20%. | GB/T 17776-2016: Determination of sulfur in feedstuff -- Magnesium nitrate 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.
Determination of sulfur in feedstuff - Magnesium nitrate method
ICS 65.120
B46
National Standards of People's Republic of China
Replacing GB/T 17776-1999
Determination of sulfur in feed
Magnesium nitrate method
Determination ofsulfurinfeedstuff-
2016-06-14 release
2017-01-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China
China National Standardization Management Committee released
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 17776-1999 "Determination of sulfur in feed by magnesium nitrate".
The main technical content of this standard and GB/T 17776-1999 difference is as follows.
--- "1 Scope" added "the standard limit of 0.20%";
--- "4 reagents and solutions" in the warning language "Warning --- magnesium nitrate flammable, explosive, irritating, storage should be away from the light, away from the fire
Species, heat, to avoid direct contact with the human body. ";
--- in the "7 measurement steps" under the heading "warning --- magnesium nitrate flammable, explosive, irritating, heating must be small fire, cautious
operating. ";
In the original standard "7 Determination step" "Remove the porcelain crucible, after cooling, add 15mL water, 7mL hydrochloric acid (4.1), boil,
Filtered, washed thoroughly, and the filtrate was diluted to about.200 mL. "Revised to" 7 Determination Procedure "" Remove the porcelain crucible, pending
After cooling, add 15 mL of water, 7 mL of hydrochloric acid (4.1), boil, filter and wash the residue with hot distilled water every 10 mL ~ 20 mL
Until the filtrate is about.200mL. "
This standard is proposed and assigned by the National Committee for Standardization of Feed Industry (SAC/TC76).
The drafting of this standard unit. the State Feed Quality Supervision and Inspection Center (Wuhan).
The main drafters of this standard. Qian Fang, Huang Ting, He Xu Kong, Wang Sisi, Gao Junfeng, Zhang Yong, Yang Lin, He Fengqin.
This standard replaced the previous version of the standard release.
--- GB/T 17776-1999.
Determination of sulfur in feed
Magnesium nitrate method
1 Scope
This standard specifies the determination of sulfur in feed.
This standard applies to a single feed, with feed, concentrated feed and concentrate supplement.
The standard limit is 0.20%.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 14699.1 Feed Sampling
GB/T .20195 Preparation of animal feed samples
3 principle
The sulfur in the feed sample was fixed with magnesium nitrate to complete the oxidation. Under acidic conditions, sulfate ions are precipitated as sulfuric acid with barium chloride
Barium, precipitated by filtration, washing and burning, weighing barium sulfate in order to obtain sulfur content.
4 reagents and solutions
Warning - magnesium nitrate flammable, explosive, irritating, storage should be away from light, away from fire, heat, to avoid direct contact with the human body.
Unless otherwise specified, all reagents used in this standard are of analytical grade. Experimental water should be consistent with GB/T 6682 in the three water specifications or quite pure
Degree of water.
4.1 Hydrochloric acid.
4.2 magnesium nitrate solution. Weigh 95g of magnesium nitrate [Mg (NO3) 2 · 6H2O] dissolved in water and diluted to 100mL.
4.3 barium chloride solution. 10g barium chloride dissolved in 100mL water.
4.4 silver nitrate solution. concentration c (AgNO3) 0.1mol/L.
5 instruments and equipment
In addition to commonly used laboratory equipment, other equipment as follows.
5.1 Sampling. pore size of 0.42mm (40 mesh).
5.2 Analysis of the balance. the sense of 0.0001g.
5.3 high temperature furnace. controllable temperature at 820 ℃ ± 20 ℃.
5.4 porcelain crucible. 50mL.
5.5 thermostat electric furnace.
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