A copper cluster protected with 2-phenylethanethiol (PET) exhibiting distinct optical features in UV/Vis spectroscopy is reported. Matrix-assisted laser desorption ionisation mass spectrometry of the cluster shows a well-defined molecular ion peak at m/z 5,800, assigned to *Cu38(PET)25. Fragmented ions from the cluster show the expected isotope patterns in electrospray ionisation mass spectrome...

Leaves of Adinandra nitida were used as raw material, and a new industrially significant method of preparing apigenin was established by hydrolyzing a water extract and recrystallizing it with ethanol in order to obtain a new source for the production of this flavone. A yield of about 2.5 % (dry mass) was obtained with the purity of 93.05 %, determined by high performance liquid chromatography ...

Abstract The synthesis of stable triacylgermenolates 3 a , b was achieved by using multiple silyl abstraction methodology. formation these new germenolates confirmed NMR spectroscopy and UV‐Vis measurements. Moreover, for the 2 LIFDI mass spectrometry to characterize compounds. Germenolates serve as starting point triaacylgermane 4 two octaacyldigermanes c d . acylgermanes spectroscopy, X‐ray c...

Atomic Absorption Based Techniques. Atomic Fluorescence Spectroscopy. Figure 1.3 Schematic diagram showing the before (left) and after (right) the draw the sample into a nebulizer by the Bernoulli Effect where it is converted. Atomic absorption and emission spectroscopy in the ultraviolet and visible A schematic diagram of a UV-Vis spectrophotometer is shown in Figure.11. Preface Inductively co...

Abstract In many countries, groundwater quality is routinely monitored in yearly or quarterly intervals. Such frequencies, however, may not be sufficient for investigations into the temporal dynamics of water quality, due to seasonal variability responses extreme events. One approach overcome this limitation use in-situ sensors, such as UV-Vis spectrometers. With a focus on nitrate an abundant ...