then the Si concentrations in the solutions were measured by the colorimetric molybdenum blue method at 811 nm with a spectrophotometer (PGENERAL TU-1901 UV-VIS, Beijing, China). A control (no sample) was added to eliminate porcelain crucible errors.
then the Si concentrations inthe solutions were measured by the colorimetric molybdenum blue method at 811 nm witha spectrophotometer (PGENERAL TU-1901 UV-VIS, Beijing, China). A control (nosample) was added to eliminate porcelain crucible errors.