Determination of carbohydrazide and kinetics of condensation reaction of carbohydrazide with malachite green by spectrophotometry

作者：Wu T; Zhang TL^*; Chen HY; Zhang JG

来源：Chinese Journal of Chemistry, 2005, 23(1): 50-53.

DOI：10.1002/cjoc.200590011

• carbohydrazide
• malachite green
• kinetics and mechanism
• spectrophotometry

The kinetics of the condensation reaction of malachite green and carbohydrazide was studied by spectrophotometry in aqueous solution in the temperature range of 15.0-22.0 degreesC. The reaction was found to be second-order overall, first-order with respect to each reactant. The effect of ionic strength on the reaction has negative salt effect in the range of 0.2-1.0 mol.L-1. A mechanism of the reaction between malachite green and carbohydrazide was proposed, and the rate equation derived from the mechanism can explain all experimental observations properly. Based on this reaction, a method of determining the content of carbohydrazide in the concentration range of (0.02-0.5) X 10(-3) mol.L-1 was proposed.

• 出版日期2005-1
• 单位北京理工大学