Determination of urotropine in phenolic resin powder used in abrasive tools by infrared spectrometry
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摘要: 乌洛托品的红外光谱灵敏度高。商业用酚醛树脂粉中,乌洛托品的1007 cm-1吸收峰与酚醛树脂的1510 cm-1吸收峰互不影响,可通过红外KBr压片法对磨具用酚醛树脂粉中乌洛托品的含量进行测定。本试验通过外标法和内标法分别对酚醛树脂粉中乌洛托品含量进行定量,并与化学滴定法(高氯酸法)进行了对比。试验结果表明:采用红外光谱测定酚醛树脂粉中乌洛托品含量的相对标准偏差小于2%,测试精度满足国标GB/T24412-2009的要求,测试过程简单,可用于磨料磨具行业对酚醛树脂粉中乌洛托品含量的测定。Abstract: There is high sensitivity of infrared spectrum for urotropine and no interference between the infrared absorption peaks of urotropine(1007 cm-1)and commercial phenolic resin powder(1509 cm-1).So,it is feasible to determine the content of urotropine in phenolic resin powder used in abrasive tools by infrared KBr tabletting method.The content of urotropine in phenolic resin powder is analyzed quantitatively by external standard method(ESTD)and internal standard method(ISTD)respectively and also compared with chemical titration method(perchloric acid titration).The results show that the relative standard deviation of the content determination of urotropine in phenolic resin powder by infrared spectrometry is less than 2%.The accuracy of this method meet the requirement of GB/T24412-2009.This method is simple and reliable,which can be applied to measure the content of urotropine in phenolic resin powder for abrasives industry.
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Key words:
- infrared spectrometry /
- KBr pellet /
- urotropine /
- quantitative analysis /
- phenolic resin
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