Anti-CBZ polyclonal antibody

The monitoring of emerging pollutants in wastewaters is nowadays an issue of special concern, with the classical quantification methods being time and reagent consuming. In this sense, a FTIR transmission spectroscopy based chemometric methodology was developed for the determination of eight of these pollutants. A total of 456 samples were, therefore, obtained, from an activated sludge wastewater treatment process spiked with the studied pollutants, and analysed in the range of 200 cm(-1) to 14,000 cm(-1). Then, a k-nearest neighbour (kNN) analysis aiming at identifying each sample pollutant was employed. Next, partial least squares (PLS) and ordinary least squares (OLS) modelling approaches were employed in order to obtain suitable prediction models. This procedure resulted in good prediction abilities regarding the estimation of atrazine, desloratadine, paracetamol, beta-estradiol, ibuprofen, carbamazepine, sulfamethoxazole and ethynylestradiol concentrations in wastewaters. These promising results suggest this technology as a fast, eco-friendly and reagent free alternative methodology for the quantification of emerging pollutants in wastewaters.

Pharmaceuticals and personal care products (PPCPs) contain a diverse range of organic groups that present a serious threat to the ecological environment and human health. However, their actual fate in rivers remains only partially understood. The occurrence, distribution, and risk assessment of PPCPs in aquatic systems have received global research attention. However, few studies have focused on the Longgang River in Shenzhen City, South China. This study was the first to simultaneously identify and quantify five PPCPs residues in the mainstream of Longgang River. All surface water and sediment samples were analyzed by solid-phase extraction (SPE) and high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). The five assessed PPCPs were all detected in the mainstream of the Longgang River, with sediment concentrations much higher than water concentrations. Fluconazole and Triclosan were the dominant PPCPs in water and sediments, with maximum concentrations of 55.86 ng/L and 19.24 mu g/kg, respectively. Others were present at mean concentrations below 40 ng/L in water and 15 mu g/kg in sediments. The recovery rates of the five PPCPs ranged from 57.2% to 110.6%, which were within the limits of reliability. These results demonstrate that sewage treatment plants exhibited different degrees of removal effects for the five PPCPs and showed a natural attenuation trend along the Longgang River for all PPCPs except carbamazepine. The trace amounts of individual PPCPs residues in the river posed a low risk to aquatic organisms in the mainstream, although the potential risks created by low dose exposure and bioaccumulation of PPCPs should be considered.