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  • Title: Determination of indole in shrimps by differential-pulse voltammetry in an emulsified medium.
    Author: Pingarrón Carrazón JM, Reviejo García AJ, Polo Díez LM.
    Journal: Analyst; 1990 Jun; 115(6):869-71. PubMed ID: 2393091.
    Abstract:
    A method has been developed to determine indole in shrimps by differential-pulse voltammetry at a Pt electrode in an emulsified medium, after extraction into hexane - ethyl acetate (49 + 1). The standard additions method was used in order to minimise the matrix effect. Recoveries at the concentration levels of 11.71 and 0.94 micrograms g-1 of shrimp were 82 and 75%, respectively. The relative standard deviations were 3.5 and 4.0%, respectively. The accuracy of the proposed method was verified by comparing the results obtained from the analysis of shrimp samples allowed to decompose at room temperature for 1, 3 and 4 d, with those obtained from a spectrophotometric method by applying Student's t-test.
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