Chemiluminescence of Peracetic Acid in Alkaline Medium and its Application to Dihydralazine Sulfate Determination |
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Authors: | Hanchun Yao Xiaofeng Yang Hua Li |
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Affiliation: | (1) Institute of Analytical Science, Northwest University, 710069 Xi’an, China;(2) Department of Chemistry, Northwest University, 710069 Xi’an, China |
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Abstract: | The chemiluminescence (CL) of peracetic acid (PAA) in alkaline medium is very weak but is strongly enhanced after the addition of dihydralazine sulfate (DHZS). Based on this phenomenon, a simple, rapid and highly sensitive flow-injection CL method for the determination of DHZS was developed. The CL emission was linearly related to the DHZS concentration in the range of 20–4000 ng mL−1 with a detection limit (3σ) of 1.2 ng mL−1. As a preliminary application, the proposed method was successfully applied to the determination of DHZS in pharmaceutical preparations; the recovery of DHZS in human urine was between 96.5% and 102.2%. A detailed CL mechanism was proposed and singlet molecular oxygen (1O2) was suggested to be produced in the CL reaction process. |
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Keywords: | : Chemiluminescence peracetic acid singlet molecular oxygen dihydralazine sulfate. |
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