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 ) ]
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: arsenite, As ( III ), sodium diethyldithiocarbamate, DDTC, 1 - octyl - 3 - methylimidazolium hexafluorophosphate, [ C ( 8 ) mim ] [ PF ( 6 ) ] 
Answer:
 Chemical: arsenite; Chemical: As ( III ); Chemical: sodium diethyldithiocarbamate; Chemical: DDTC; Chemical: 1 - octyl - 3 - methylimidazolium hexafluorophosphate; Chemical: [ C ( 8 ) mim ] [ PF ( 6 ) ]