通过对氰尿酸重结晶温度、提纯次数及固液比的优化，建立了一种氰尿酸的重结晶提纯方法。经提纯后的氰尿酸样品采用红外光谱法、核磁共振法对其结构进行定性表征，氰尿酸质控品进行对照验证。样品纯度采用酸碱滴定法进行测试，结果表明，经重结晶后的样品纯度可达到98.9%。该方法可有效提纯氰尿酸，并可应用于氰尿酸纯度标准物质的研制。
关键词: 氰尿酸 / 重结晶 / 提纯 / 酸碱滴定
Abstract:
By optimising the recrystallisation temperature, purification cycles and solid-to-liquid ratioin cyanic acid production, a purification method for cyanic acid has been established. The structure of the purified cyanic acid samples is qualitatively characterised using infrared spectroscopy and nuclear magnetic resonance spectroscopy, and the results are validated against a quality control sample. The purity is determined using acid-base titration. Results indicate that the purity of the recrystallised samples reach 98.9%. This method can effectively purify cyanuric acid and is applicable to the development of materials at cyanuric acid purity.
Keywords: cyanuric acid / recrystallisation / purification / acid-base titration