APCI natural waters

The photodegradation of XII was enhanced by humic substances (10mgL-1) or in a natural water sampled in a dam (Villerest, France) (7.2 mg CL-1). Formation of the photoproducts was measured by HPLC-atmospheric pressure chemical ionization-MS (HPLC-APCI-MS) using se-... 

The degradation of pentachlorophenol (PCP) in natural waters was studied by LC-DAD and confirmed by APCI-LC-MS both after Lichrolut EN SPE. A half-life of PCP in ground water, in estuarine and river waters of < 2 h was reported... 

Lopez de Alda and Barcelo [14] reported the determination of natural and synthetic estrogens and progestogens in influents and effluents from a sewage treatment plant (STP), surface water, and drinking water. The estrogens were determined as [M-H] in negative-ion ESI, the progestogens as [M-i-Na] in positive-ion mode ESI or APCI. Detection limits of <1 ng/1 water have been achieved. 

Polycyclic aromatic hydrocarbons have been encountered in different environmental matrices (e.g., soil, atmosphere, water, biota, etc.). Because PAHs have natural fluorescent properties, LC-FLD is advantageous over GC-MS because of its ability to measure the different PAH isomers and comparable detection limits are obtained. LC-DAD and LC-APCI-MS can also be applied and have the advantage... 

A hot phosphate-buffered water extraction system (buffer, water at 90 °C or soxh-let with methanol) followed by subsequent Cjg-SPE coupled on-line to ESI-LC-MS was used for the analysis of monoHnuron, metabenzthiazuron, linuron and nebur-one in naturally aged agricultural soil. [546]. The comparison of ESI and APCI-LC-MS for the determination of diflubenzuron in fmits, proved that APCI was more efficient than ESI. The appHcation of positive-negative mode switching MS al-... 

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