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Citation: HE Chunxiang, WANG Wei, HUO Chunbao, GAO Feng. High Acidity Test Paper Based on Brilliant Blue as Color Agent[J]. Chinese Journal of Applied Chemistry, ;2015, 32(10): 1215-1220. doi: 10.11944/j.issn.1000-0518.2015.10.150056 shu

High Acidity Test Paper Based on Brilliant Blue as Color Agent

1.
College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China

Corresponding author: HE Chunxiang, GAO Feng,
Received Date: 6 February 2015
Available Online: 13 May 2015
Fund Project: 辽宁省高等学校杰出青年学者成长计划(LJQ2014118) (LJQ2014118)

The color response of brilliant blue to the acidity of solutions (H⁺ concentration 0.1 mol/L) and the mechanism were studied using a prepared high acidity test paper.The results show that the colors of dissolved or fixed brilliant blue vary with the change of the acidity of solutions.It turns regularly from blue,green,kelly to yellow with the increase of H⁺ equilibrium concentration from 0.1 to 9.0 mol/L in the solution.The color transition only depends on the acidity of the solution and is unaffected by the acid type or its oxidation.The absorption phenomena between the color variation of brilliant blue and solution acidity were investigated by spectrophotometry,and the mechanism was also proposed.The high acidity paper was prepared based on the color response of brilliant blue to the acidity.It can be used to directly detect the H+concentration of the solution in the range of 0.1~9.0 mol/L with the accuracy of ±1 mol/L.
- brilliant blue,
- acidity response,
- high acidity test paper,
- mechanism of color variation
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