离子选择电极法测定土壤中水溶性氟

阐述了离子选择电极法测定土壤中水溶性氟的方法。进行了缓冲液用量、浸取时间，水土比等条件实验。该方法精密度好、准确度高，适用于不同类型的土壤中水溶性氟的测定。  

离子选择性电极测定煤中氟浓度方法及影响因素分析

采用高温碱熔离子选择性电极法测量烟煤及石煤中氟化物浓度，对测量过程中的影响因素进行了分析，并对溶液的ｐＨ值及温度的影响进行了试验研究，结果表明该测量方法准确度较高，误差小，测量方便快速，实用性强，可作为煤及其它矿物质中氟含量测量的一种有效方法  

氟化物应作为建陶行业环境影响评价的因子

对建陶行业氟化物的来源及其在环境中的化学行为进行了分析，结果表明，在釉面砖生产过程中排放的氟化物浓度超过国家规定的标准。并以此提出总量控制和评价因子的问题，探讨了氟污染排放标准和质量标准的相关性。  

Fluoride Content in Drinking Water Supplies of Riyadh, Saudi Arabia

Groundwater supplies about 34% ofthe total water demand for the capital city of SaudiArabia, Riyadh. The other 66% is desalinatedseawater. The fluoride level in Riyadh drinking watersupplies was evaluated. Samples were collected fromselected wells, treatment plants, desalinatedseawater, distribution network and 19 locally producedand imported bottled water. The fluoride level in theinfluent to the seven groundwater treatment plants andtheir final product water were in the range of 0.63–1.6 and 0.23–1.1 mg/L, respectively. Blending of theplants product water with the desalinated seawaterresulted in the fluoride level ranging from 0.01–0.5 mg/Lin the distribution network. Ninety percent of thesamples collected from the distribution network hadfluoride levels less than or equal to the calculatedweighted average value of 0.24 mg/L. The locallyproduced bottled waters as compared to 8 imported oneshave shown fluoride levels in the range of 0.2–0.83and 0.04–0.2 mg/L, respectively. In general, thefluoride level in Riyadh drinking water supplies isbelow the optimum recommended level of 0.7 to1.2 mg/L. It is therefore recommended thatfluoridation be considered in water treatment plants.  

高氟水沸石除氟的效果研究

通过静态搅拌实验和恒温震荡实验,研究了接触时间、pH、温度及反复使用次数对沸石除氟效果的影响.结果表明,在适宜的条件下,沸石除氟效果随着使用次数的增多有上升趋势,除氟效果良好,适用于我国高氟水地区.  

石家庄市农村饮用水中氟化物健康风险评估

利用中国疾病预防控制信息系统农村饮用水水质监测数据,对2010年18个项目县的水质监测结果进行分析,评估石家庄市农村饮用水氟化物对人群危害的风险。 石家庄市农村饮用水中氟化物浓度为0.01~0.98 mg/L,平原县和山区县饮用水氟化物浓度差异无显著性(t=-1.403,P>0.05),只有72份氟化物浓度超过0.5 mg/L,占9.7%。石家庄市农村患龋齿风险性较大,及时增加氟的摄入量非常必要。  

离子选择电极法测定水中氟离子影响因素的探讨

离子选择电极法测定水中氟离子的监测方法,因其操作简单、干扰少、不必进行预处理等优点,广泛应用于环境监测领域。但国家标准检测方法对检测过程条件控制及影响因素等没有明确写明。本文结合实验和文献资料,对检测过程中出现的结果偏差进行了探讨。  

水体环境中氟化物的测定方法研究

利用离子选择电极法和离子色谱法,比较测定了饮用水、景观水及地表水水体中氟化物的含量,发现对污染程度不同的水体两种方法表现出不同的优势,可以指导分析人员根据水体污染程度选择相应的检测方法。  

Fluoride Deposition in Central India

Fluoride is a volatile element emitted from natural and anthropogenic sources into the atmoshere and scavenged from the atmosphere by rain water. We collected 444 rain water and 36 dust samples on an event basis at 13 sites and on the bulk basis (monthly) at 3 sites, respectively, in central India (extending over 17°N to 24°N latitude and 80° 17 to 84°11E longitude). The level of F- in the atmospheric samples was determined by automating the conventional Zr(IV)-SPADNS [Sodium 2- (parasulfophenylazo)-1, 8-dihydroxy-3, 6-naphthalene disulfonate] method in the presence of surfactant, i.e. TX–100 [Triton x- 100]. The detection limit of the method is 10.0 ppb F- with a sample throughput of 70 samples/h. The F- deposited with rain water (in 13 sites) and with dust (three sites) were ranged between 54.8 to 483.0, and 105.0 to 503.3 kg/km2/year, respectively. The level of F- in atmospheric samples, seasonal and spatial variation in deposition and sources of F- are discussed.  

Groundwater Quality Assessment of Tehsil Kheragarh, Agra (India) with Special Reference to Fluoride

Fluoride concentration and other parameters in groundwater from 261 villages in Tehsil Kheragarh of District Agra were assessed and attempts were made to observe the relationship between fluoride and other water quality parameters. Of 658 groundwater samples (collected from separate sources) analysed for fluoride, 27% were in the range of 0–1.0 mg/L, 25% in 1.0–1.5 mg/L, 32% in1.5–3.0 mg/L and 16% above 3.0 mg/L. The highest fluoride concentration recorded was 12.80 mg/L. Significant correlation of fluoride with pH, alkalinity, Na, SiO₂ and PO₄ were observed. Factor analysis was also attempted in order to identify the contributing sources.