Finally, the application of the synthesized material was evaluated for preconcentration and determination of mercuric ions from foods and environmental waters samples.
To evaluate the persistence of antibiotics coming from the wastewater discharges on the surrounding surface waters, samples were collected from the receiving streams at 10-, 20- and 100-m intervals.
This paper presents a novel method which is simple, highly selective, and sensitive for rapid pre-concentration and microextraction of ultra-trace levels of Ni2 + in natural foods and waters samples.
The relative standard deviation (RSD) for intra- and inter-day of extraction of PAHs were in the range of 1.6 4.7 and 2.1 5.3, respectively, for five measurements.The developed method was used to assess the occurrence of 15 PAHs in tap water, rain waters and river surface waters samples.
Physico-chemical parameters (pH, Turbidity, DO, Magnesium, Calcium, SiO3, Phosphate and Nitrate) of collected waters samples were measured following APHA (2005).
The online SPE LC/MS/MS method for waters samples was validated in terms of specificity, linearity, limit of detection, matrix recoveries and inter-day precision of the technique.
A cross-sectional study was conducted on 218 drinking waters samples collected between February and June 2016 to assess water quality using phages by the help of CB390 E. coli host, plaque assay; multiple tube fermentation for coliforms and pour plate for heterotrophic bacteria at Ethiopian Public Health Institute.
The isotope hydrology atlas should have location maps from where the various waters samples have been collected for isotopic analyses (2H, 18O, 3H, 13C, 14C), relevant isotopic plots and summary statistics (iso-plots, median, mean), along with average annual precipitation, air temperature, etc.
Chlorophyll-a content of sub-surface waters samples collected in the present study ranged from 0.207 ± 0.095 to 6.144 ± 1.367 mg m−3, with 50%% of the samples measured <1 mg m−3, 42.3 % of the samples measured between 1 and 3 mg m−3, and 7.7%% of the samples measured more than 5 mg m−3 (Fig. 5).
For culture of waste waters, samples were diluted 3-fold before processing according to ISO 11731 [ 12].
The confirmation of selected pharmaceuticals and TPs in environmental waters samples was accomplished by the structural information of deprotonated parent compound obtained from the fragmentation experiment provided by LC-QTOF-MS/MS analysis.
