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NY/T 1121.12-2006

Chinese Standard: 'NY/T 1121.12-2006'
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NY/T 1121.12-2006English95 Add to Cart 0--15 minutes. Auto immediate delivery. Soil Testing. Part 12: Method for determination of soil total chrome Valid NY/T 1121.12-2006
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Detail Information of NY/T 1121.12-2006; NY/T1121.12-2006
Description (Translated English): Soil Testing. Part 12: Method for determination of soil total chrome
Sector / Industry: Agriculture Industry Standard (Recommended)
Classification of Chinese Standard: B11
Classification of International Standard: 13.080.05
Word Count Estimation: 6,664
Date of Issue: 2006-07-10
Date of Implementation: 2006-10-01
Drafting Organization: National Agricultural Technology Extension and Service Center
Administrative Organization: Ministry of Agriculture
Regulation (derived from): Ministry of Agriculture Bulletin No. 680
Summary: This standard applies to the determination of chromium in soil types.

NY/T 1121.12-2006
NY
AGRICULTURAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 13.080.05
B 11
Soil testing -
Part 12. Method for determination of soil total chrome
土壤检测
第 12部分. 土壤中总铬的测定
ISSUED ON. JULY 10, 2006
IMPLEMENTED ON. OCTOBER 01, 2006
Issued by. Ministry of Agriculture of the People's Republic of China
Table of contents
Foreword ... 3 
1 Scope of application ... 5 
2 Method summary ... 5 
3 Instruments and equipment ... 5 
4 Reagents and solutions ... 5 
5 Analysis steps ... 6 
6 Results analysis ... 7 
7 Precision ... 8 
8 Comments ... 8 
Foreword
NY/T 1121 Soil testing is a standard series, which include the following parts.
- Part 1. Soil sampling, processing, and reposition;
- Part 2. Method for determination of soil pH;
- Part 3. Method for determination of soil mechanical composition;
- Part 4. Method for determination of soil bulk density;
- Part 5. Method for determination of soil cation exchange capacity in
calcareous soil;
- Part 6. Method for determination of soil organic matter;
- Part 7. Method for determination of available phosphorous in acid soil;
- Part 8. Method for determination of soil available boron;
- Part 9. Method for determination of soil available molybdenum;
- Part 10. Method for determination of soil total hydrargyrum;
- Part 11. Method for determination of soil total arsenic;
- Part 12. Method for determination of soil total chrome;
- Part 13. Method for determination of soil exchangeable calcium and
magnesium;
- Part 14. Method for determination of soil available sulphur;
- Part 15. Method for determination of soil available silicon;
- Part 16. Method for determination of total water-soluble salt;
- Part 17. Method for determination of soil chloride ion content;
- Part 18. Method for determination of soil sulphate content;
...
This part is part 12 of NY/T 1121.
This part was proposed by AND shall be under the jurisdiction of Ministry of
Agriculture of the People's Republic of China.
Soil testing -
Part 12. Method for determination of soil total chrome
1 Scope of application
This part is applicable to the determination of chrome in various soils.
2 Method summary
After sulphuric acid, nitric acid, and phosphoric acid digestion, chromium
compounds in the soil are converted into soluble substance; USE potassium
permanganate to oxidize chromium into hexavalent chromium; USE sodium
azide to reduce and eliminate the excessive potassium permanganate; under
acidic conditions, hexavalent chromium reacts with diphenylcarbazide (DPC) to
form a purple-red compound, which is measured spectrophotometrically at a
wavelength of 540 nm.
3 Instruments and equipment
3.1 Spectrophotometer
3.2 Centrifuge
3.3 Electric hot plate
4 Reagents and solutions
The reagents and water used in this test method, unless otherwise stated, refer
to analyti......
Related standard:   NY/T 1121.7-2014  NY/T 1121.9-2012
   
 
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