FTIR과 XRD를 이용한 a.-Quartz 분석법 비교

Comparision of Analytical Methods for a.-Quartz by FTIR and XRD

This study compared FTIR with XRD method for the anysis of quartz by % recovery, coefficient of variation (CV) and influence of the interference. the results were as the following. 1. In FTIR method, the coεfficient of determination (r2) was 0.9998 in a calibration curve of 695 cm-1, and the limit of detection was 4.9 μg/sample. 2. The highest recovery was 799 cm-1 (98.2%). 3. πle CVpooled of the FTIR method was approximately 10% in three wave numbers. 4. The analysis of qualitative and quantitative for qutz is difficult with mixed cristobalite and iron oxide. 5. In XRD method with rotating sample holder and LynxEye detector, the coefficient of determination was 0.9996 in a calibration curve,and the limit of detection was 5.9 μg/sample. 6. The recovery and CV pooled were 104.3%, and 11 %, rζ， spective1y. 7. In mufflε fumace asng， the quartz weight decrled to 34% when the maximum weit of the iron 0dε was more than eight times. In conclusion, the accuracy (% recovery) and pr떠sion (CV) of FTIR and XRD method for analyzing a.-qutz were similar. FTIR method was a disadvantage for sample matrix because it indicates possibility of inκrference. However, XRD method dis디ng버shed specific crystalline forms of silica, and the majority of silicatε minerals. In addition, XRD method recommend filter dissolution to pretreatment method.