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氟离子在人体中作为一种营养性的痕量元素而存在,但人体所摄入的氟离子量只应在一个较狭窄的范围内。人体长期摄入过高量的氟化物将引起氟中毒,表现为斑釉齿症或氟骨症。确定人体或牲畜是否氟中毒,可取血、骨检验之。但最切合实际的办法是检验尿中氟。尿氟的测定过去多用繁琐耗时的比色法。此法首先需要16—24小时进行分离干扰的“扩散”,即将尿氟化物经强酸作用生成氟化氢气体,再吸收于氢氧化钠溶液中。氟离子选择电极法测定溶液中氟离子简便、快速、灵敏度高及干扰甚少。由
Fluoride ions in the human body as a nutritional trace elements exist, but the amount of fluoride ions ingested by the body should only be in a narrower range. Long-term intake of excessive fluoride will cause fluoride poisoning, manifested as spot glaucoma or skeletal fluorosis. Determine whether human body or livestock is poisoned by fluorosis and can take blood and bone test. But the most practical way is to test urinary fluoride. Determination of urinary fluoride in the past with cumbersome and time-consuming colorimetry. This method first takes 16-24 hours to separate the “diffusion” of interference, that is to say, the fluoride of urine is generated into hydrogen fluoride gas by the action of strong acid and then absorbed in sodium hydroxide solution. Fluoride ion selective electrode method for the determination of fluoride ions in the solution is simple, rapid, high sensitivity and little interference. by