傅立叶变换红外光谱法快速鉴别非金属矿物中重烧镁

重烧镁外观与高岭土、白云石及硅灰石等矿物的外观极为相似，常被混入这些矿石中向境外走私。为了快速鉴别这些矿物中的重烧镁，实验采用傅里叶变换红外光谱技术分别研究了具有不同重烧镁含量的三种矿物其光谱特征，并与重烧镁及不含重烧镁的矿物谱图进行比对。结果表明，当这些矿物中混入一定量的重烧镁时，重烧镁的红外特征吸收峰依然明显存在。当只含有10%的重烧镁，根据谱图的特征变化，依然能够鉴别出这些矿物中混入的重烧镁，即鉴定这些矿物中重烧镁的检出限为10%。方法对实际样品进行了分析，分析结果与化学法相符。

Fast identification of dead burnt magnesite in nonmetallic minerals by Fourier transform infrared spectrometry

The appearance of dead burnt magnesite was very similar to kaolin, dolomite and wollastonite ores, so it was usually mixed into these minerals for abroad smuggling. In order to fast identify the dead burnt magnesite in these minerals, the Fourier transform infrared spectrum technology was used to study the spectral signature of three minerals containing various contents of dead burnt magnesite. Then, the spectra were compared with those of dead burnt magnesite and minerals without dead burnt magnesite. The results showed that, when certain amount of dead burnt magnesite was mixed into these minerals, the infrared characteristic absorption peak of dead burnt magnesite still existed. When the content of dead burnt magnesite was 10%, it could be also identified based on the change of characteristic spectrum. In other words, the detection limit of dead burnt magnesite in these minerals was 10%. The proposed method was applied to the analysis of actual samples and the results were consistent with the chemical method.