This standard specifies the use of mass method and conductivity method to determine the total amount of drying residue and salt in the chemical analysis of forest soil water; determination of pH value by potentiometric method; determination of total acidity of acidic and weak water samples by neutralization titration method; potassium permanganate -Determination of organic carbon by sulfuric acid oxidation method and potassium permanganate-sodium hydroxide oxidation method; determination of hydrolyzed nitrogen by alkaline hydrolysis and diffusion method; determination of silicon by silica molybdenum blue colorimetry; determination of o-phenanthroline colorimetry and atomic absorption spectrophotometry Iron; determination of aluminum by aluminum reagent colorimetry; determination of manganese by formaldehyde colorimetry and atomic absorption spectrophotometry; determination of calcium and magnesium by EDTA complex titration and atomic absorption spectrophotometry; determination of potassium and sodium by flame photometry; double indicator Determination of carbonate and bicarbonate by agent neutralization titration; determination of nitrogen radical by silver nitrate titration; determination of sulfate radical by EDTA indirect titration and barium sulfate turbidimetric method; determination of phosphate radical by molybdenum antimony colorimetric method; determination of Kjeldahl by volumetric method Nitrogen; direct distillation method and Nessler's reagent colorimetric method for determination of ions; phenol disulfonic acid colorimetric method for determination of nitrate radicals, etc. This standard applies to forest soil water chemistry analysis.
LY/T 1275-1999 history
1999LY/T 1275-1999 Chemical analysis methods of forest soil water