Transportable EDXRF analysis of environmental water samples using Amberlite IRC748 ion-exchange preconcentration

2010 ◽  
Vol 39 (3) ◽  
pp. 176-183 ◽  
Author(s):  
E. S. Heiden ◽  
D. B. Gore ◽  
S. C. Stark
Keyword(s):  
Ion Exchange ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Edxrf Analysis

scholarly journals Speciation analysis of chromium in environmental water samples from Niigata Prefecture by using ion-exchange/ICP-AES

2004 ◽  
Vol 53 (9) ◽  
pp. 1015-1019 ◽  
Author(s):  
Yuki IWASAKI ◽  
Naoki KANO ◽  
Kazuhiro OMORI ◽  
Hiroshi IMAIZUMI ◽  
Toshio ISHIZUKA
Keyword(s):  
Ion Exchange ◽  
Water Samples ◽  
Speciation Analysis ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Niigata Prefecture

scholarly journals Monitoring Method of Hydroxyl Functionalized Imidazolium Ionic Liquids in Complex Environment Water Samples

2021 ◽  
Author(s):  
Zhenjie Yin ◽  
Sheng Liu ◽  
Xinxin Jin ◽  
Yajie Ma ◽  
Hong Yu
Keyword(s):  
Ionic Liquids ◽  
Ion Exchange ◽  
Solid Phase Extraction ◽  
Ion Chromatography ◽  
Water Samples ◽  
Solid Phase ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Phase Extraction ◽  
Imidazolium Ionic Liquids

Abstract With the increasing emphasis on the toxicity of ionic liquids, it is imperative to develop detection methods for ionic liquids in complex environments. A new method for the analysis of hydroxyl functionalized imidazolium ionic liquids in complex environmental water samples by using ion chromatography and solid-phase extraction was developed. Under the selected chromatographic conditions, the complete separation of the two analytes was achieved in 14.0 min. The linear and repetitive data of the approach for the analysis of the two cations by ion chromatography meet the requirements of quantitative analysis. The extraction of [HEMIm]+ and [HPMIm]+ in water samples by ion-exchange solid-phase extraction and reversed-phase solid-phase extraction was compared. The results show that the enrichment and purification of two target cations can be better achieved using ion-exchange solid-phase extraction approach, and the enrichment multiple was 50 times. The method was used to determine the target cations in two river waters. The recovery of standard addition was between 82.5% and 96.0%, the detection limit was less than 0.01 mg/L, and inter-assay RSD was less than 2.5%. The method is simple, accurate and reliable. It is suitable for the determination of hydroxyl functionalized imidazolium ionic liquid cations in 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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