- abstract:
A method to determine F and Cl in silicate materials by employing pyrohydrolysis and ion chromatography (IC) is described. Pyrohydrolysis involved mixing a pulverised sample (∼40 mg) with V2O5 (∼160mg) and heating to 1100°C under a wet oxygen flow in a quartz tube. Recovery yields of F and Cl were ∼97% using a NaF+NaCl standard solution. Detection limits of the pyrohydrolysis‐IC method for silicate samples were 0.36 and 0.69μg*g‐1 for F and Cl, respectively. Fluorine and Cl concentrations were determined in the reference materials JB‐2, JB‐3 and JA‐1 from the GSJ; BCR‐2, BHVO‐1, BHVO‐2, AGV‐1 and AGV‐2 from the USGS; and NIST SRM 610, 612 and 614 glasses. Precisions (RSD) for determinations of F were 1–13% (except NIST SRM 614) and 2–19% for Cl, and were dependent on the concentration and blank correction. Most results obtained in this study were in good agreement with those of previous studies. In comparison, the Na2CO3+ZnO fusion method at 900°C showed that the yields of F and Cl by alkaline fusion systematically decreased with fusion duration time. The yields were 84% and 83% for JB‐3, inferring that F and Cl were lost in this alkaline fusion.
- doi: 10.1111/j.1751-908X.2010.00043.x
- modified at 2021-01-19
@article{20170113184744-227770,
author = "Wang, Q. and Makishima, Akio and Nakamura, E.",
title = "Determination of fluorine and chlorine by pyrohydrolysis and ion chromatography: comparison with alkaline fusion and ion chromatography",
journal = "Geostandards and Geoanalytical Research",
year = "2010",
number = "2",
volume = "34",
pages = "175--183",
doi = "10.1111/j.1751-908X.2010.00043.x",
}| caption | ID | rowname | stone | ||
|---|---|---|---|---|---|
| Table 3-4. Flourine and Chlorine concantrations in silicate reference materials pub | 20190515110138-439284 | F-Cl (Wang et al., 2010) | 12 | ||