天然水、饮用水和废水样品中溴化物、碘离子检测方案(毛细管电泳仪)

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Analytical Equipment山INTRODUCTIONThe method allows determination of bromide and iodide ions in natural, potable (incl. bottled), and mineral water using capillary electrophoresis (CE) method.MEASUREMENT METHODMeasurement method is based on sample filtration and its subsequent separation in a fused silica capillary under the influence of the applied electric field. Identification and quantification of bromide and iodide ions is performed by registering their intrinsic absorbance at 200 nm wavelength.MEASUREMENT RANGEMeasurement ranges of the analyzed anions in the samples are: for bromide ions 0.05–100 mg/L,for iodide ions 0.1–100 mg/L.Chloride ions with mass concentration ratio 4000:1 do not influence determination of bromide ions.EQUIPMENT AND REAGENTSThe CAPEL® capillary electrophoresis system is used in measurements. Data acquisition, collection, processing and output are performed using a personal computer running under  WINDOWS® XP/7/8 operating system with installed dedicated software package ELFORUN®. All reagents must be of analytical grade or better.EXAMPLE OF A REAL ANALYSISBGE: sulfate, with CTA-OH Capillary: Leff/ Ltot 50/60 cm, ID 75 µm Injection: 600 mbar x secVoltage: – 20 kV Temperature: +20 oC Detection: 200 nm, indirect