Liquid-phase microextraction and fibre-optics-based cuvetteless CCD-array micro-spectrophotometry for trace analysis

A glance at achievements in the coupling of headspace and direct immersion single‐drop microextraction with chromatographic techniques

“…Since the volume of the microdrop is limited, the coupling of SDME with detection techniques that require larger injection volumes may be difficult. Nevertheless, SDME procedures with subsequent electrothermal atomic absorption spectrometry and microvolume UV/Vis spectrophotometry and spectrofluorometry have also been reported . Finally, an increasing interest in the in‐line coupling of SDME and CE has also recently become evident .…”

“…One can find, however, various modifications of SDME that more or less differ from the above‐described general procedure. Examples of the application the two most commonly used modes of SDME—HS and DI—can be found in the Supporting Information …”

Griess micro-assay for the determination of nitrite by combining fibre optics-based cuvetteless UV–Vis micro-spectrophotometry with liquid-phase microextraction

“…Nevertheless, recent advances made towards the development of miniaturized spectrophotometric systems, such as microvolume capillaries and microcells systems [36-38], as well as cuvetteless micro-spectrophotometers, where a drop is hold in place by surface tension only [39], currently allow this combination with no dilution. To date, combination of LPME techniques with UV-Vis micro-spectrophotometry has been used to determine iodide and iodine [35], acid labile sulfide (by microvolume turbidimetry) [40], thiols, residual free chlorine and chlorine dioxide, ammonia and total iodine [41], trimethylamine-nitrogen [42], chloride [43] and iodate [44].…”

Application of ultrasound-assisted emulsification microextraction for spectrophotometric determination of trace amounts of antimony(v) in drinking water samples using rhodamine B

“…[29][30][31] Compared with expensive instrumentation, the application of spectrophotometry is mainly limited by its poor sensitivity. Recently, some research work has focused on the combination of miniaturized extraction methods with micro-volume UV-Vis spectrophotometry 32 and ber optic-linear array detection spectrophotometry. 33 The cost of conventional spectrophotometry and its simplicity makes it a widely used detection method.…”