The titration of methanobactin with Cu(II) was monitored by both UV/Vis and NMR spectroscopy and indicates that the major transitions occurring when Cu(II) interacts with methanobactin involve a two-step process that is complete by about 0.6 Cu:mb. This suggests that a 2:1 complex is formed between methanobactin and copper at low copper levels. If this complex exists, it would be different than...

The concentration of iodine species can be measured using several different analysis methods. One of the most wellknown methods involves iodine titration with a thiosulfate solution. Total iodine can be analyzed using spectrometry, such as inductively coupled plasma-atomic emission spectrometry (ICP-AES), atomic absorption spectrometry (AAS) and inductively coupled plasma-mass spectrometry (ICP...

Tetrapyrazinoporphyrazine with peripheral menthol-thiophenyl substituents was synthesized using Linstead conditions and purified by flash column chromatography. The optimized synthetic purification procedures allowed us to obtain a new macrocycle 36% yield. derivative characterized UV–Vis NMR spectroscopy, as well MS spectrometry. Complex studies 1D 2D techniques the analysis of bulky substitut...

Kaolinite-rich Cretaceous clay sediment samples from Burgos (Spain) have been analyzed by elemental analysis, X-ray fluorescence, inductively coupled plasma mass spectrometry, diffraction and different spectroscopic techniques, as Fourier Transform Infrared, ultraviolet–visible electron paramagnetic resonance. The mainly contain quartz, muscovite kaolinite. Different radicals, A- B-Centers in k...

This article gives a brief overview of the major portable techniques: those based on optical spectroscopy techniques, including near-infrared (NIR), mid-infrared (mid-IR), and Raman spectroscopy; mass spectrometry (MS) systems, high-pressure MS (HPMS), gas chromatography–MS (GC–MS), ion mobility (IMS); elemental such as X-ray fluorescence (XRF) laser-induced breakdown (LIBS); emerging miniaturi...

A Keggin polyoxometalate (POM, i.e., PW12O40(3-)) and its lacunary derivative are immobilized on an anionic exchange resin through electrostatic interaction at pH 4.6 in an aqueous dispersion. The resin-supported POM thus obtained catalyzes the efficient degradation of cationic dye pollutants in the presence of H2O2 under visible-light irradiation. To evaluate the photocatalytic system, degrada...