28396
However , the sensor shows much higher measurement repeatability than the open substrate , and it reduces the sample preparation time from several hours to a few minutes , which makes the device more reliable and facile for trace chemical and biological analysis .
 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