NY/T 1121.12-2006 PDF EnglishUS$90.00 · In stock · Download in 9 seconds
NY/T 1121.12-2006: Soil Testing. Part 12: Method for determination of soil total chrome Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure
Similar standardsNY/T 1121.12-2006: Soil Testing. Part 12: Method for determination of soil total chrome---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/NYT1121.12-2006NY AGRICULTURAL INDUSTRY STANDARD ICS 13.080.05 B 11 Soil testing - Part 12.Method for determination of soil total chrome Issued on: JULY 10, 2006 Implemented on: OCTOBER 01, 2006 Issued by. Ministry of Agriculture of the People's Republic of China Table of ContentsForeword... 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... 8ForewordNY/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 chrome1 Scope of applicationThis part is applicable to the determination of chrome in various soils.2 Method summaryAfter 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 equipment3.1 Spectrophotometer 3.2 Centrifuge 3.3 Electric hot plate4 Reagents and solutionsThe reagents and water used in this test method, unless otherwise stated, refer to analytical grade reagents and grade 1 water as specified in GB/T 6682.The solution, if not specified, is an aqueous solution. 4.1 Nitric acid (excellent grade pure, ρ = 1.42) 4.2 Sulphuric acid (excellent grade pure, ρ = 1.84) 4.3 Phosphoric acid (excellent grade pure, 85%) 4.4 Potassium permanganate (excellent grade pure) ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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