[New technology for sample preprocessing in NIR analysis].
Sample's moisture content and granularity would have an important influence on NIR veracity. Preprocesssing methods have been used for NIR analysis to achieve better NIR veracity. With Yunnan flue-cured tobacco as study materials, the authors innovatively applied microwave fast drying technology and home pulverizer to tobacco preprocessing, which could finish the preprocessing in 5 min, faster than the traditional methods such as oven drying and sifting. Results showed that: microwave fast drying technology could improve NIR analysis veracity when samples' moisture content had a wide range; influence of samples' granularity on NIR veracity could be eliminated after 25 s home pulverizer shatter. This study can offer a new method for NIR analysis workers to simplify NIR preprocessing.
Qin
Xi-yun
XY
Yunnan Tobacco Science Research Institute, Yuxi 653100, China.
Li
Jun-hui
JH
Yang
Yu-hong
YH
Chang
Zhi-qiang
ZQ
D003890:Desiccation / Q000379:methods*; D008872:Microwaves; D009538:Nicotine / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis; D018515:Plant Leaves / Q000737:chemistry; D019265:Spectroscopy, Near-Infrared; D014026:Nicotiana / Q000737:chemistry*; D014867:Water / Q000032:analysis
D010936:Plant Extracts; D014867:Water; D009538:Nicotine