26555
Recoveries at three spiked levels ( 10 , 50 , 100ng / g ) in random selected food matrices were in range of 71 - 121 % with RSDs not larger than 25 % .
 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