Determination of chromium (VI) in primary and secondary fertilizer and their respective precursors.

Hexavalent chromium species (Cr(VI)) are often carcinogenic, of high acute toxicity, highly mobile, and thus pose a severe risk to health and environment. Fertilizers usually contain significant amounts of chromium. Therefore, a reliable analysis of chromium and the fraction of Cr(VI) are crucial for safe use of fertilizers.

Fast identification of microplastics in complex environmental samples by a thermal degradation method.

In order to determine the relevance of microplastic particles in various environmental media, comprehensive investigations are needed. However, no analytical method exists for fast identification and quantification. At present, optical spectroscopy methods like IR and RAMAN imaging are used.

Analysis of polyethylene microplastics in environmental samples, using a thermal decomposition method.

Small polymer particles with a diameter of less than 5 mm called microplastics find their way into the environment from polymer debris and industrial production. Therefore a method is needed to identify and quantify microplastics in various environmental samples to generate reliable concentration values. Such concentration values, i.

Assessment of a new method for the analysis of decomposition gases of polymers by a combining thermogravimetric solid-phase extraction and thermal desorption gas chromatography mass spectrometry.

For analysis of the gaseous thermal decomposition products of polymers, the common techniques are thermogravimetry, combined with Fourier transformed infrared spectroscopy (TGA-FTIR) and mass spectrometry (TGA-MS). These methods offer a simple approach to the decomposition mechanism, especially for small decomposition molecules. Complex spectra of gaseous mixtures are very often hard to identify because of overlapping signals.

Pharmacokinetic analysis of octa-alpha-butyloxy-zinc phthalocyanine in mice bearing Lewis lung carcinoma.

Objective: In this study, the pharmacokinetics of octa-alpha-butyloxy-zinc phthalocyanine (8-alpha-bo-ZnPc) was studied with regard to Lewis lung carcinoma in mice after intravenous administration of 7.8 mumole/kg body weight at different incubation intervals.

Summary Background Data: The newly synthesized potential photosensitizer 8-alpha-bo-ZnPc is characterized by a high absorption coefficient at the far red wavelength (735 nm) with a good singlet oxygen quantum yield.