Method for rapidly detecting content of chromium in furniture factory wastewater

Abstract

The invention discloses a method for rapidly detecting the content of chromium in furniture factory wastewater. The method comprises the following steps: selecting acetone, sulfuric acid, phosphoric acid, a 20% urea solution, a 4% potassium permanganate solution, a 2% sodium nitrite solution and a 0.2% sodium hydroxide solution for later use, weighing zinc sulfate, and dissolving the zinc sulfate in water; weighing sodium hydroxide, dissolving the sodium hydroxide in water, and mixing the obtained zinc sulfate solution with the obtained sodium hydroxide solution; weighing dry potassium dichromate, dissolving the dry potassium dichromate in water, transferring the obtained solution to a 1000 mL volumetric flask, and allowing the content of hexavalent chromium in the obtained storage solution to be 0.100 [mu]g / mL; sucking 5.00 mL of the chromium standard storage solution to a 500 mL volumetric flask, and allowing the content of hexavalent chromium in the obtained standard use solution to be 1.00 [mu]g / mL; weighing 0.2 g of diphenylcarbazide, dissolving the diphenylcarbazide in 50 mL of acetone, adding water to dilute to 100 mL, reducing Cr<6+> into Cr<3+>, adjusting the pH value of a water sample to 8, adding a color developer solution, disposing the obtained water sample for 5 min, carrying out acidifying color developing, and making a standard curve by using the above same method; and calculating a result. The method has the advantages of simple detection process, high accuracy of the detection result, avoiding of damages of standard exceeding chromium to human bodies, and protection of people's health.

Description

technical field [0001] The invention relates to a method, in particular to a method capable of quickly realizing the determination of chromium content in furniture factory wastewater. Background technique [0002] Drinking water refers to water that can be directly supplied to the human body for drinking without treatment. Water is the main component of body fluid, and is an important substance that constitutes cells, tissue fluid, plasma, etc. As the medium of all chemical reactions in the body, water is a platform for the transportation of various nutrients and substances. With its 40% market share, packaged drinking water has firmly ranked the top spot in the national beverage market. In the industry, pure water, natural mineral water and mineral water manufacturers account for the largest proportion. Consumers' preferences for drinking water have changed, and the strategic focus of enterprises has also shifted to natural mineral water following the market. From Janua...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned existing method for measuring chromium content in drinking water with complicated steps, and the error of the measured result is large, which is likely to cause harm to people after drinking for a long time. A method for determining the chromium content in medium, the determination process of the method is simple, and the determination result is high in accuracy, which can avoid the damage caused by excessive chromium to the human body, protect people's health, and solve the existing steps of the determination method for the chromium content in drinking water It is complicated, and the measurement results have a large error, which is likely to cause harm to people after long-term drinking