24750
Rapid chromatographic separation was achieved in the mobile phase composition of acetonitrile , water and formic acid ( v / v / v , 55 : 45 : 0 . 1 ) with a flow rate of 0 . 25 ml / min .
 Chemical: acetonitrile; Chemical: formic acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: acetonitrile; Chemical: formic acid