An improved method for calibrating the concentration of Na2S2O3 solution

doi:10.14088/j.cnki.issn0439-8114.2019.13.023

Abstract

Abstract: In order to study the optimum conditions for calibrating the concentration of Na₂S₂O₃ solution with known concentration of H₂O₂ solution, the results were analyzed by single factor and orthogonal experiment. The experimental results showed that the concentration of 0.821 8 mol/L H₂O₂ solution 1.00 mL,20 g/L KI solution 60 mL and 25%H₃PO₄ 6 mL solution for 30 min. The experimental results were the best, the standard deviation s was 0.09%, and compared with the results of K₂Cr₂O₇ method. The experimental results were analyzed by F test, no significant difference. The method of green environmental protection, can be used as an method of calibrating Na₂S₂O₃ solution concentration.

Key words: Na₂S₂O₃ solution, calibration, method, improvement

CLC Number:

O655.2

LI Wei, XIONG Jian, ZHOU Yi, YAN Can. An improved method for calibrating the concentration of Na₂S₂O₃ solution[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(13): 111-113.

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An improved method for calibrating the concentration of Na₂S₂O₃ solution

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