Sample has weak absorbance in short near infrared range so that near infrared can acquire deep-seated information of sample without pretreatment.

 
  • 在短波近红外谱区,物质对近红外光的吸收比较弱,使得近红外光无需对样品进行前处理就可以直接穿透物质,取得物质深层的信息。
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