26550
To response to the need for a rapid , cost - effective , eco - friendly and efficient extraction process , a sensitive method for the determination of ethylenethiourea ( ETU ) in food matrices by high - performance liquid chromatography - mass spectrometry ( HPLC - LC / MS ) was developed and validated .
 ethylenethiourea, ETU
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ethylenethiourea, ETU