Optimization of the preconcentration of selenium iv on palladium nanoparticles (PdNPs), using multivariate analysis for the inorganic speciation of selenium in environmental water samples

2015 ◽  
Vol 7 (19) ◽  
pp. 8262-8270 ◽  
Author(s):  
G. Kiran Kumar ◽  
P. S. Sharma ◽  
Suvarna Sounderajan ◽  
D. Datta ◽  
R. K. Singhal ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Water Samples ◽  
Palladium Nanoparticles ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Simple Method ◽  
Inorganic Speciation

A simple method for the characterization and quantification of ultratrace quantities of Se(iv) in environmental water samples by preconcentration of selenium(iv) on PdNPs was optimized by employing the multivariate strategy.

A simple method for evaluating Cryptosporidium-specific antibodies used in monitoring environmental water samples

1997 ◽  
Vol 25 (5) ◽  
pp. 316-320 ◽  
Author(s):  
G. Vesey ◽  
D. Deere ◽  
C.J. Weir ◽  
N. Ashbolt ◽  
K.L. Williams ◽  
...  
Keyword(s):  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Simple Method ◽  
Specific Antibodies

Functionalization of Reduced Graphene Oxide with β-cyclodextrin Modified Palladium Nanoparticles for the Detection of Hydrazine in Environmental Water Samples

2016 ◽  
Vol 29 (2) ◽  
pp. 587-594 ◽  
Author(s):  
Subramanian Sakthinathan ◽  
Subbiramaniyan Kubendhiran ◽  
Shen-Ming Chen ◽  
Pedaballi Sireesha ◽  
Chelladurai Karuppiah ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Water Samples ◽  
Palladium Nanoparticles ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Reduced Graphene

scholarly journals Analytical Methodology for Trace Determination of Propoxur and Fenitrothion Pesticide Residues by Decanoic Acid Modified Magnetic Nanoparticles

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4621 ◽  
Author(s):  
Amine Gizem Canlı ◽  
Bilge Sürücü ◽  
Halil İbrahim Ulusoy ◽  
Erkan Yılmaz ◽  
Abuzar Kabir ◽  
...  
Keyword(s):  
Water Samples ◽  
Magnetic Particles ◽  
Solid Phase ◽  
Standard Addition ◽  
Decanoic Acid ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Analytical Methodology ◽  
Simple Method

A sensitive, rapid, reliable, and easily applicable method based on magnetic solid phase extraction (MSPE) combined with HPLC-PDA was developed for monitoring propoxur (PRO) and fenitrothion (FEN) pesticides in environmental water samples. The effect of major experimental variables on the extraction efficiency of both the pesticides was investigated and optimized systematically. For this purpose, a new magnetic material containing decanoic acid on the surface of particles was synthesized and characterized by XRD, FT-IR, SEM, EDX, and TGA analysis in detail. The simultaneous determination of pesticide molecules was carried out by using a Luna Omega C18 column, isocratic elution of acetonitrile (ACN): Water (70:30 v/v) with a flow rate of 1.2 mL min−1. After MSPE, the linear range for pesticide molecules (r2 > 0.9982) was obtained in the range of 5–800 and 10–800 ng mL−1, respectively. The limit of detections (LOD) are 1.43 and 4.71 ng mL−1 for PRO and FEN, respectively while RSDs % are below 3.5%. The applicability of the proposed method in four different environmental samples were also investigated using a standard addition-recovery procedure. Average recoveries at two spiking levels were over the range of 91.3–102.5% with RSD < 5.0% (n = 3). The obtained results show that decanoic acid grafted magnetic particles in MSPE combined with HPLC-PDA is a fast and simple method for the determination of PRO and FEN in environmental water samples.

Characterization of As (V), As (III) by selective reduction/adsorption on palladium nanoparticles in environmental water samples

Talanta ◽  
2009 ◽  
Vol 78 (3) ◽  
pp. 1122-1128 ◽  
Author(s):  
Suvarna Sounderajan ◽  
G. Kiran Kumar ◽  
Sanjukta A. Kumar ◽  
A.C. Udas ◽  
G. Venkateswaran
Keyword(s):  
Water Samples ◽  
Palladium Nanoparticles ◽  
Selective Reduction ◽  
Environmental Water ◽  
Environmental Water Samples

Improving Mycobacterium spp. detection in water: a new methodological proposal

2004 ◽  
Vol 4 (2) ◽  
pp. 103-106
Author(s):  
R. Santos ◽  
S. Gonçalves ◽  
F. Macieira ◽  
F. Oliveira ◽  
R. Rodrigues ◽  
...  
Keyword(s):  
Water Samples ◽  
Recovery Rate ◽  
Opportunistic Infections ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Sample Treatment ◽  
Detection Time ◽  
Fast Detection ◽  
Enrichment Step ◽  
Mycobacterium Spp

In recent years, non-tuberculous mycobacteria (NTM), once considered merely environmental saprophytes, have emerged as a major cause of opportunistic infections. There is no evidence of human-to-human transmission but they have been found in several environmental water samples. It is, therefore, of the utmost importance to develop methods of rapidly and accurately detecting non-tuberculous mycobacteria in water samples. To obtain a maximum recovery rate and a reduction of Mycobacterium spp. detection time in water samples, different decontamination, enrichment procedures and antibiotics supplements were tested before the inoculation into the Bactec® system. The proposed method of sample treatment (decrease in the decontamination time, followed for a peptone pre-enrichment step and an aztreonam and cefepime supplement) before the inoculation into the Bactec® system proved to be a good option for reliable and fast detection of Mycobacterium spp. in water samples.

The Occurrence of Male-Specific and Somatic Bacteriophages in Polluted South African Waters

1991 ◽  
Vol 24 (2) ◽  
pp. 251-254 ◽  
Author(s):  
R. Kfir ◽  
P. Coubrough ◽  
W. O. K. Grabow
Keyword(s):  
South African ◽  
Water Samples ◽  
Biological Treatment ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Resistance Pattern ◽  
Male Specific

The occurrence of somatic (F') and male-specific (F') coliphages and Salmonella phages in a variety of environmental water samples was studied using different bacterial hosts. The number of plaque-forming units (pfu) of the different bacteriophages were compared and their resistance pattern to a biological treatment (humus tank) and chlorination was evaluated. The presence of the bacteriophages in shellfish was also studied. The morphology of isolate bacteriophages was examined as well as the visibility of the different plaques formed. Coliphages were found to produce larger and clearer plaques than all other bacteriophages studied. In most of the environmental water samples coliphages outnumbered all other bacteriophages, with the exception of dam water in which higher levels of F' Salmonella phages were detected. The majority of the F' Salmonella phages were shown to be RNA bacteriophages.

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