17091
For five independent determinations at 0 . 2 and 1 . 0 mu g / kg , the coefficient of variation was less than 5 . 1 % .
 None
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:  
Answer:
 None