2459
The second point is a methodological aspect , utilizing tangential filtration for reducing the residual surfactants in the bulk phase and serving as well for concentrating droplets ( and iodine ) in the suspension .
 Chemical: iodine
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: iodine