Improvement of determination and analysis method o

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Considering that the current market shipment situation has not improved yet, the coking plant considers the improvement of the total nitrogen determination and analysis method

when determining the total nitrogen in water with "alkaline potassium persulfate digestion violet from January 1, 2017" ultraviolet spectrophotometry,

by reducing the concentration of sodium hydroxide in oxidant,

4:4 keep the content of "4 keep" of the equipment and keep the appearance of the equipment clean; Maintain the structural integrity of equipment; Maintain the performance and accuracy of equipment; Maintain the automation of the equipment so that the solution after digestion can be directly measured at the wavelength of 210 nm

in addition,

compared with the original method, the analysis steps are simplified

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