17215
Samples were saponified and underwent solid phase extraction with analysis by normal phase liquid chromatography ( LC ) with ion trap mass spectroscopy ( IT - MS ) , using positive polarity atmospheric pressure chemical ionisation ( APCI ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None