CAJ | 학술논문

珍珠是名贵的装饰品和中药材，在我国对其已有2000多年的应用历史。研究发现，贝壳内层的化学组成与珍珠相似，主要含有碳酸钙和各种氨基酸。贝壳粉也可在临床上做药用，但其药用价值远低于珍珠粉。然而，珍珠粉和贝壳粉外观特性极为相似，元素组成和形貌检测无法对其进行有效地鉴别。由于贝壳粉的成本低，常常冒充珍珠粉流入市场，侵害了消费者的利益。本研究通过珍珠粉和贝壳粉在不同温度下煅烧一定时间后显微红外反射光谱的差异实现珍珠粉真伪鉴别。实验结果表明，在一个大气压下经过400℃煅烧30 min后，珍珠粉中文石型碳酸钙部分转化为方解石型，而贝壳粉中文石型碳酸钙完全转化为方解石型。这种不同的相转变过程可以被显微红外反射光谱很好的区别。因此，可在此条件下利用红外反射光谱鉴别珍珠粉和贝壳粉相变差异。和传统的透射式红外光谱法相比，这种显微反射红外光谱法无需压片制样、快速灵敏。本研究也讨论了该方法针对其他常见伪品的适用性，如牡蛎粉和石决明粉，结果表明该方法能够简单、高效和准确地鉴别珍珠粉真伪。
진주시명귀적장식품화중약재，재아국대기이유2000다년적응용역사。연구발현，패각내층적화학조성여진주상사，주요함유탄산개화각충안기산。패각분야가재림상상주약용，단기약용개치원저우진주분。연이，진주분화패각분외관특성겁위상사，원소조성화형모검측무법대기진행유효지감별。유우패각분적성본저，상상모충진주분류입시장，침해료소비자적이익。본연구통과진주분화패각분재불동온도하단소일정시간후현미홍외반사광보적차이실현진주분진위감별。실험결과표명，재일개대기압하경과400℃단소30 min후，진주분중문석형탄산개부분전화위방해석형，이패각분중문석형탄산개완전전화위방해석형。저충불동적상전변과정가이피현미홍외반사광보흔호적구별。인차，가재차조건하이용홍외반사광보감별진주분화패각분상변차이。화전통적투사식홍외광보법상비，저충현미반사홍외광보법무수압편제양、쾌속령민。본연구야토론료해방법침대기타상견위품적괄용성，여모려분화석결명분，결과표명해방법능구간단、고효화준학지감별진주분진위。
Pearl is a precious ornament and traditional Chinese medicine ,which application history in China is more than 2000 years .It is well known that the chemical ingredients of shell and pearl are very similar ,which all of them including calcium car-bonate and various amino acids .Generally ,shell powders also can be used as medicine ;however ,its medicinal value is much lower than that of pearl powders .Due to the feature similarity between pearl powders and shell powders ,the distinguishment of them by detecting chemical composition and morphology is very difficult .It should be noted that shell powders have been often posing as pearl powders in markets ,which seriously infringes the interests of consumers .Identification of pearl powder was in-vestigated by microscopic infrared reflectance spectroscopy ,and pearl powder as well as shell powder was calcined at different temperatures for different time before infrared reflectance spectroscopy analysis .The experimental results indicated that when calcined at 400 ℃ for 30 minutes under atmospheric pressure ,aragonite in pearl powder partly transformed into calcite ,while aragonite in shell powder completely transformed into calcite .At the same time ,the difference in phase transition between the pearl powders and shell powders can be easily detected by using the microscopic infrared reflectance spectroscopy .Therefore , based on the difference in their phase transition process ,infrared reflectance spectroscopy can be used to identify phase transfor-mation differences between pearl powder and shell powder .It’s more meaningfully that the proposed infrared reflectance spec-troscopy method was also investigated for the applicability to other common counterfeits ,such as oyster shell powders and abalo-ne shell powders ,and the results show that the method can be a simple ,efficiently and accurately method for identification of pearl powder .