9613
Highly selective separation of arsenite species [ As ( III ) ] was achieved by chelation with sodium diethyldithiocarbamate ( DDTC ) followed by dispersion with 40 mg of 1 - octyl - 3 - methylimidazolium hexafluorophosphate ( [ C ( 8 ) mim ] [ PF ( 6 ) ] ) IL .
 Chemical: arsenite; Chemical: As ( III ); Chemical: sodium diethyldithiocarbamate; Chemical: DDTC; Chemical: 1 - octyl - 3 - methylimidazolium hexafluorophosphate; Chemical: [ C ( 8 ) mim ] [ PF ( 6 ) ]
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: arsenite; Chemical: As ( III ); Chemical: sodium diethyldithiocarbamate; Chemical: DDTC; Chemical: 1 - octyl - 3 - methylimidazolium hexafluorophosphate; Chemical: [ C ( 8 ) mim ] [ PF ( 6 ) ]