“…All vessels (a total of 60 vessels in 20 groups) were sealed with covers and stored at room temperature (at about 20 °C). The sampling time interval of the 20 groups was 1,2,3,4,7,9,11,14,17,20,23,29,35,40,45,50,60,70,80, and 90 day(s), respectively. The metasilicate in the samples (as dissolved metasilicic acid, mg/L) was determined using Silicon Molybdenum Yellow Spectrometry.…”