17106
The aim of this study was to determine the ability of an ET based on pulse voltammetry to quantify organic acids ( ascorbic , citric and malic acids ) in simple ( SS ) and binary solutions ( BS ) using different electrodes .
 ascorbic , citric and malic acids
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ascorbic , citric and malic acids