Determination of trace uranyl ion by thermoresponsive porphyrin-terminated polymeric sensor.

Uranyl ion exists at trace levels in the environment and can cause severe adverse effects to human health. Therefore, it is desirable to develop analytical methods that can determine the trace uranyl ion in aqueous medium. We report here a new method using a thermo-responsive polymeric fluorescent sensor.

[Study on the arithmetic of absorbance inversion based on tunable diode-laser absorption spectroscopy].

Tunable diode-laser absorption spectroscopy techniques have been widely used in many regions, such as environmental monitoring and detection of industrial process, due to their high spectral resolution, high sensitivity, fast time response and nonintrusive character. It's important to obtain absorbance curve and integrated absorbance for gas concentration inversion and line strength calibration in direct-absorption spectroscopy techniques. An approach was taken to process the laser direct absorption spectrum.

[An investigation of temperature compensation of HCL gas online monitoring based on TDLAS method].

HCL, with the character of strong erosion and toxicity, is a kind of chemical material of vital importance. So measuring the HCL in-situ can not only optimize its production process, but also be necessary to reduce the environment pollution. TDLAS (tunable diode laser absorption spectroscopy) technology, and owning the advantage of the tunability and narrow line width of the diode laser, this method can relatively easily select the absorption line of the detected gas without the interference from other gas, thus making the rapid and accurate HCL measurement possible.