煅硼砂的红外光谱分析与评价

Infrared Spectral Analysis for Calcined Borax

对煅硼砂饮片进行质量评价。以18个不同含水量的煅硼砂样品为研究对象,使用傅里叶红外光谱仪采集样品的红外吸收图谱,并对红外图谱进行分析,再根据分析结果对煅硼砂饮片进行质量评价。发现煅硼砂的红外光谱主要包括OH、BO33-和BO45-振动引起的三个吸收带,OH振动吸收带的位置及宽度依赖于含水量的高低,含水量越高,吸收带越宽;BO33-及BO45-振动吸收带的数目也取决于含水量的高低,含水量越高,氢键作用越强,B原子的对称性越低,红外吸收峰数目越多。结论:因含水量与煅硼砂样品的质量直接相关,故红外光谱法可为煅硼砂的质量分析与评价研究提供一种灵敏、客观的方法和手段。

To valuate the quality of calcined borax which is sold in the market,18 samples of calcined borax were studied using the Fourier transform infrared,and samples with different water content were selected and analyzed.Then,the results of analysis were used to evaluate the quality of calcined borax.Results show that the infrared spectra of calcined borax include OH vibration,BO3-3 vibration and BO5-4 vibration absorption bands.The position and width of OH vibration absorption band depend on the level of water content,and the more the water content,the wider the absorption band.The number of BO3-3 vibration and BO5-4 vibration bands also depend on the level of water content,and the more the water content,and the stronger the hydrogen bond and the lower the symmetry of B atoms,the more the number of infrared absorption peaks.It was concluded that because the quality of calcined borax has direct correlation with water content,the infrared spectroscopy is an express and objective approach to quality analysis and evaluation of calcined borax.