Direct determination method for particulate phosphorus based on non-point source pollution
A measurement method, a technology of non-point source pollution, applied in the preparation of test samples, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., can solve the problem of inaccuracy and cumbersome operation steps , time investment and other problems, to achieve the effect of improving accuracy, meeting work requirements and reducing errors
Inactive Publication Date: 2019-11-15
ANHUI UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
After checking a large number of literatures, it can be found that the difference between total phosphorus and dissolved phosphorus is generally used to represent granular phosphorus. On the one hand, this method is not accurate enough; on the other hand, the operation steps are cumbersome and time-intensive
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0035] After filtering through a 0.45 μm filter membrane, dry the sample, weigh 0.2500 g of the sample at the bottom of the nickel crucible, moisten the sample with a few drops of absolute ethanol: then add 2 g of sodium hydroxide and spread it on the surface of the sample to cover the sample , cover the crucible lid for digestion, after standing still, transfer all the supernatant into a 100ml volumetric flask, dilute to volume with water, and wait for the test. Measure 0, 0.50, 1.00, 3.00, 5.00, 10.00ml of phosphorus standard working solution into six 50ml colorimetric tubes with stoppers, add water to the mark, then add 2 to 3 drops of indicator, and then oxidize with sulfuric acid solution and hydrogen Adjust the pH value of the sodium solution to about 4.4 to make the solution just slightly yellow, then add 1.0ml of ascorbic acid solution and mix well. After 30s, add 3.0ml molybdate solution, mix thoroughly, and place at 20-30°C for 15min. Use a 30mm cuvette to measure t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a direct determination method for particulate phosphorus based on non-point source pollution. The method comprises the following steps: filtering a sample by a film with 0.45mu m thickness, and baking the sample; weighing 0.2500g of the sample for dispelling; after standing, transferring all supernatant into a bottle of 100ml volume; fixing volume with water, and waitingfor test; pouring 0, 0.5, 1.00, 3.00, 5.00 and 10.00 ml of phosphorus standard working solution into six 50ml colorimetric tubes with plugs respectively; pouring 10.0ml (or the volume depending on theconcentration of the sample) of the sample into the 50ml colorimetric tubes with plugs; adding water to the scale for color development; measuring absorbance at 70nm wavelength with 30mm cuvette andwater as reference; drawing a calibration curve and determining content by using reagent blank correctionabsorbance as Y-axis and using corresponding phosphorus content (p, g) as X-axis. The direct determination method has the beneficial effects that a method for directly determining particulate phosphorus in water is not adopted, error in the measurement process can be reduced as much as possible, and determiningaccuracy of the particulate content in water can be improved.
Description
technical field [0001] The invention relates to the field of measuring environmental water quality indicators, in particular to a method for directly measuring granular phosphorus based on non-point source pollution. Background technique [0002] Due to the erosion of rainfall, a large amount of P elements in the field were taken away, and phosphorus exists in natural water bodies can be divided into: ① dissolved phosphorus, including dissolved organic phosphorus and inorganic phosphorus; ② granular phosphorus, including adsorption on particulate matter Phosphorus on. Therefore, the sediment adsorbed with nutrients such as phosphorus is the main source of non-point source pollution, and soil erosion, farming, etc. will increase the sediment output of the watershed, and this part of the sediment entering the river will also increase the nutrient content of the water body. It causes many water quality problems and increases the material exchange (adsorption-release process) b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/44
CPCG01N1/44G01N21/78
Inventor 赵一蔚
Owner ANHUI UNIV OF SCI & TECH