25478
The limit of detection was 3 . 81 mu gL ( - 1 ) of Se ( IV ) and the relative standard deviation for 5 replicate determinations at 250 mu gL ( - 1 ) concentration level was 2 . 45 % .
 Chemical: Se ( IV )
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: Se ( IV ) 
Answer:
 Chemical: Se ( IV )