摘要
目的比较红外光谱法与焦磷酸消化法测定粉尘中游离二氧化硅的可行性。方法对粉尘中游离二氧化硅含量用上述2种方法分别进行测定,比较2种方法测定结果。结果红外光谱法与焦磷酸消化法测定游离二氧化硅含量值差异无统计学意义(P>0.05),游离二氧化硅含量在0～100.03 mg范围内与吸光度值有良好的线性关系,相关系数r=0.9996。样品加标回收率为93.08%～95.01%,测定结果的相对标准偏差不大于5.21%(n=5)。结论红外光谱法可以实现高精度快速批量检测,可以逐步取代焦磷酸消化法。
[Objective]To compare the feasibility of infrared spectroscopy and digestive pyrophosphate in determination of free silica in dust.[Methods]The content of free silica in dust were determined by the above 2 methods,the results were compared.[Results]The determination results of free silica in dust by infrared spectroscopy and digestive pyrophosphate were not significant（P0.05）.The concentration of free silica showed a good linearity with absorbance value in the range of 0～100.03 mg,with correlation coefficient r =0.9996.The recoveries were 93.08%～95.01%.The relative standard deviation was not more than 5.21%（n=5）.[Conclusion]Infrared spectroscopy can achieve fast batch testing with high accuracy,and can replace pyrophosphate digestion gradually.
出处
《职业与健康》
CAS
2010年第16期1836-1838,共3页
Occupation and Health
