9612
A highly efficient separation and pre - concentration method for arsenic species determination , based on ionic liquid ( IL ) dispersive microextraction technique implemented in a flow analysis system , is proposed .
 Chemical: arsenic
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: arsenic