Abstract：An acid-base titration of boron in silica refractory was established. After being dissolved with water and filtrated, the sample solution was adjusted to pH 7.0 and added with mannitol as reinforcer. Phenothalin was used as titration indicator of the end point, and sodium hydroxide was used as titrant to turn the solution to red. The effect of dissolution methods, temperature, sample particle size and mannitol dosage was tested. It showed when the sample was ground to 80 μm, the titration effect was optimal with 6 g of mannitol in water-dissolved sample at room temperature. The proposed method was applied to determine two silica refractory samples, whose results were consistent with those of inductively coupled plasma atomic emission spectrometry. The relative standard deviation (RSD, n=6) was 0.016%-0.017%.
何峰, 杜勇, 王平, 等. B2O3对锂铝硅系统微晶玻璃结构性能的影响[J]. 武汉科技大学学报 (Journal of Wuhan University of Science and Technology), 2007, 29(6):1-6.
[2]
孙伟.高硼硅酸盐玻璃的技术管理[J]. 玻璃与搪瓷(Glass and Enamel), 2009, 37(5):11-18.
[3]
Ma L J, Zhang Z X, Li Q M.Spectrophotometric determination of boron based on charge transfer reaction[J]. Spectrochim.Acta:Part A, 2011, 79(2):599-602.
