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GB/T 17777-2009: Determination of molybdenum in feeds -- Spectrophotometry
Status: Valid GB/T 17777: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 17777-2009 | English | 189 |
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Determination of molybdenum in feeds -- Spectrophotometry
| Valid |
GB/T 17777-2009
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| GB/T 17777-1999 | English | 239 |
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Determination of molybenum in feedstuff--Spectrophotometry
| Obsolete |
GB/T 17777-1999
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PDF similar to GB/T 17777-2009
Basic data | Standard ID | GB/T 17777-2009 (GB/T17777-2009) | | Description (Translated English) | Determination of molybdenum in feeds -- Spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B46 | | Classification of International Standard | 65.120 | | Word Count Estimation | 8,86 | | Date of Issue | 2009-05-26 | | Date of Implementation | 2009-10-01 | | Older Standard (superseded by this standard) | GB/T 17777-1999 | | Quoted Standard | GB/T 6682; GB/T 14699.1; GB/T 20195 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.7 (Total No.147) | | 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 spectrophotometric determination of molybdenum by spectrophotometry feed. This standard applies to single feed, feed, concentrate feed and feed supplements in the determination of molybdenum in concentrate. Quantitative limit of 0. 2 mg/kg. | GB/T 17777-2009: Determination of molybdenum in feeds -- Spectrophotometry---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 molybdenum in feeds. Spectrophotometry
ICS 65.120
B46
National Standards of People's Republic of China
Replacing GB/T 17777-1999
Determination of Molybdenum in feed spectrophotometry
Posted 2009-05-26
2009-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard replaces GB/T 17777-1999 "Determination of molybdenum in the feed spectrophotometry."
This standard compared with GB/T 17777-1999, the main changes are as follows.
--- Increased single feed, concentrate and concentrate supplement feed measurement;
--- Increasing the limit of quantification;
--- Added "if the sample test solution iron content of less than 100μg, iron is added 1mL solution" in the text 7.1.
This standard by the National Standardization Technical Committee Feed Industry and focal points.
This standard was drafted. National Feed Quality Supervision and Inspection Center (Wuhan).
The main drafters of this standard. Gregory red, Zhang Yong, Liu Xiaomin, Yang Lin, Liu Xiang, Huang Ting, Wan Wen-sheng.
This standard replaces the standards previously issued as follows.
--- GB/T 17777-1999.
Determination of Molybdenum in feed spectrophotometry
1 Scope
This standard specifies the method for spectrophotometric determination of molybdenum by spectrophotometry feed.
This standard applies to single feed, feed, concentrate supplementary feed and feed Determination of Molybdenum in concentrate. Quantitative limit
0.2mg/kg.
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 the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 14699.1 feed samples
GB/T 20195 Animal feed sample preparation
Principle 3
Under acidic conditions, sulfur, potassium and dietary molybdenum complex, complex formation with isoamyl alcohol extraction, centrifugation with a spectrophotometer
At a wavelength of 465nm to isoamyl alcohol as the reference absorbance was measured after calibration blank, demand from the standard curve molybdenum content in the sample.
4 Reagents and solutions
Unless otherwise indicated in the analysis using only recognized as analytical reagent water should meet GB/T 6682 in three water requirements.
4.1 isoamyl alcohol. 3-methyl-1-butanol.
4.2 nitrate.
4.3 sulfuric acid.
4.4 perchloric acid.
4.5 ammonia.
4.6 hydrochloric acid.
4.7 hydrochloric acid solution Ⅰ. 1 + 1.85.
4.8 hydrochloric acid solution Ⅱ. 1 + 1.
4.9 methyl orange solution. 5g/L.
4.10 NaF saturated solution. 10g of sodium fluoride added 200mL of water, and stirred to dissolve to form a saturated solution, filter back.
4.11 stannous chloride solution (200g/L). Weigh 10g of stannous chloride (SnCl2 · 2H2O) in a beaker, hydrochloric acid solution was added 10mL
Liquid Ⅰ (4.7), heated until completely dissolved, after cooling, a few grains of metallic tin, diluted to 50mL with water stored in a glass bottle.
4.12 solution of stannous chloride (8g/L). Take 4mL solution of stannous chloride (4.11) was diluted with water to 100mL. Now with the current.
4.13 thiocyanate solution (200g/L). Weigh 50g KSCN dissolved in water and dilute to 250mL.
4.14 iron solution. Weigh 0.7022g ferrous ammonium sulfate [Fe (NH4) 2 (SO4) 2 · 6H2O], dissolved in water, sulfuric acid is added 1mL
(4.3), and diluted with water to 1000mL, iron solution was 100μg/mL.
4.15 Mo standard stock solution. Weigh 0.1840g ammonium molybdate [(NH4) 6Mo7O24 · 4H2O], dissolved in water and diluted with water to
1000mL, molybdenum solution containing 100μg/mL.
4.16 Mo standard working solution. accurate Pipette 10mL standard stock solution (4.15) and diluted with water to 500mL, the solution containing molybdenum
2μg/mL.
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