DZ/T 0064.61-2021 Methods of Analytical Groundwater Quality Part 61: Determination of Phosphate Phosphorous Bismuth Molybdenum Blue Spectrophotometric Method (English Version)
1970DZ/T 0064.61-2021 Methods of Analytical Groundwater Quality Part 61: Determination of Phosphate Phosphorous Bismuth Molybdenum Blue Spectrophotometric Method
1993DZ/T 0064.61-1993 Method for testing groundwater quality Phosphorus bismuth molybdenum blue colorimetric method for determination of phosphate