摘要
氟化物指含负价氟的有机或无机化合物。与其他卤素类似,氟生成单负阴离子。无机氟化物的例子有氢氟酸(HF)、氟化钠(NaF)等。本文用离子选择电极法和离子色谱法分别分析含氢氟酸(HF)溶液中的氟化物。发现溶液含有氢氟酸(HF)时分析氟化物,分析结果与p H值形成干扰,pH值越低氟化物的结果越高,而采用氢氧化钠将溶液中和成碱性条件和用碳酸钠-碳酸氢钠淋洗液体系稀释样品时,干扰最小。而含氢氟酸(HF)溶液采用离子选择电极法分析时溶液pH值偏低,H+偏高,会氟化物的浓度偏高,而溶液p H值调至中性条件时干扰最小,结果最接近真值。
Fluorides are organic or inorganic compounds containing negative valence fluorine.like other halogens,fluorine forms a mononegative anion.examples of inorganic fluorides are hydrofluoric acid(HF),sodium fluoride(NaF),etc.in this paper,the fluoride in hydrofluoric acid(HF)solution was analyzed by ion selective electrode method and ion chromatography.it was found that when the solution contained hydrofluoric acid(HF),the analysis result interfered with the pH value,and the lower the pH value,the higher the fluoride result.The interference was minimal when the solution was neutralized into an alkaline condition with sodium hydroxide and the sample was diluted with sodium bicarbonate-sodium bicarbonate eluent system.when the solution containing hydrofluoric acid(HF)is analyzed by ion selective electrode method,the pH value of the solution is low,and the H+is high,the concentration of fluoride is high,and the interference is minimum when the pH value of the solution is adjusted to the neutral condition,and the result is closest to the true value.
作者
钟美芳
宋为
谭琴
高伟荣
Zhong Meifang;Song Wei;Tan Qin;Gao Weirong(Hunan Xintai Environmental Service Co.,Ltd.,Changsha 410000,China;Synes Environmental Protection Co.,Ltd.,Changsha 410000,China;Engineering Technology Center of Heavy Metal Pollution Control Technology and Equipment of Hunan Non-Ferrous Industry,Changsha 410000,China;Hunan Engineering Laboratory of Non-Ferrous Heavy Metal Pollution Control Equipment,Changsha 410000,China)
出处
《广东化工》
CAS
2024年第6期122-126,共5页
Guangdong Chemical Industry
关键词
氟化氢
离子色谱法
离子选择电极法
氟化物
hydrogen fluoride
ion chromatography
ion selective electrode method
fluoride
