Fabrication, calibration and evaluation of a phosphate ion-selective microelectrode

To conduct the micro-environment study of flocs in an enhanced biological phosphorus removal (EBPR) process, a phosphate ion-selective microelectrode was developed. The cobalt-based microelectrodes have tip diameters of 5-20 μm and respond to all the three forms of phosphate ions, namely, H₂PO₄⁻, HPO₄²⁻, and PO₄³⁻. The calibration curve at pH 7.5 had a slope of 31.5 mV per decade change of concentration and a R² value of 0.99. Other characteristics of this microelectrode, such as response time, interferences from pH, ion strength, DO and other anions were also evaluated.     

博物馆室内微环境中碱性气体的被动采样方法研究

针对博物馆微环境中的碱性污染气体-氨气，采用自行研制的被动采样器，建立了一套适合博物馆馆藏文物保存环境中氨气含量分析的被动采样-离子色谱检测方法，应用于博物馆的实地采样分析，通过与主动法采样对照，获得了被动采样器在博物馆微环境中氨的吸收系数，从而获得采样点空气中氨气的浓度，为博物馆文物保存环境监测提供了可行方法。