Colorimetric determination of nitrite in clinical, food and environmental samples using microfluidic devices stamped in paper platforms

2015 ◽  
Vol 7 (17) ◽  
pp. 7311-7317 ◽  
Author(s):  
Thiago M. G. Cardoso ◽  
Paulo T. Garcia ◽  
Wendell K. T. Coltro
Keyword(s):  
River Water ◽  
Water Samples ◽  
Environmental Samples ◽  
Statistical Difference ◽  
Reference Method ◽  
Microfluidic Devices ◽  
Colorimetric Determination ◽  
River Water Samples ◽  
Paper Microfluidic

Paper microfluidic devices were explored to perform the colorimetric determination of nitrite in saliva, sausage, ham, preservative water and river water samples with no statistical difference from a reference method.

Fully inkjet-printed distance-based paper microfluidic devices for colorimetric calcium determination using ion-selective optodes

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1178-1186 ◽  
Author(s):  
Hiroyuki Shibata ◽  
Yuki Hiruta ◽  
Daniel Citterio
Keyword(s):  
Calcium Ions ◽  
Water Samples ◽  
Tap Water ◽  
Low Cost ◽  
Microfluidic Devices ◽  
Colorimetric Determination ◽  
Naked Eye ◽  
Paper Microfluidic ◽  
Calcium Determination

Fully inkjet-printed and low-cost microfluidic paper-based analytical devices (μPADs) demonstrate the simple naked-eye colorimetric determination of calcium ions in drinking and tap water samples.

Modified paramagnetic beads in a microfluidic system for the determination of ethinylestradiol (EE2) in river water samples

2010 ◽  
Vol 25 (6) ◽  
pp. 1376-1381 ◽  
Author(s):  
Noelia A. Martínez ◽  
Rudolf J. Schneider ◽  
Germán A. Messina ◽  
Julio Raba
Keyword(s):  
River Water ◽  
Water Samples ◽  
Microfluidic System ◽  
River Water Samples ◽  
Paramagnetic Beads

Spectrophotometry determination of Congo red in river water samples using nanosilver

2012 ◽  
Vol 94 (10) ◽  
pp. 1886-1892 ◽  
Author(s):  
R. Sahraei ◽  
A. Farmany ◽  
S.S. Mortazavi ◽  
H. Noorizadeh
Keyword(s):  
River Water ◽  
Water Samples ◽  
Congo Red ◽  
River Water Samples

scholarly journals Identification of Human and Animal Adenoviruses and Polyomaviruses for Determination of Sources of Fecal Contamination in the Environment

2006 ◽  
Vol 72 (12) ◽  
pp. 7886-7893 ◽  
Author(s):  
Ayalkibet Hundesa ◽  
Carlos Maluquer de Motes ◽  
Silvia Bofill-Mas ◽  
Nestor Albinana-Gimenez ◽  
Rosina Girones
Keyword(s):  
River Water ◽  
Water Samples ◽  
Environmental Samples ◽  
Fecal Contamination ◽  
Source Tracking ◽  
Animal Origin ◽  
Urban Sewage ◽  
River Water Samples ◽  
Negative Results ◽  
Wastewater Samples

ABSTRACT The Adenoviridae and Polyomaviridae families comprise a wide diversity of viruses which may be excreted for long periods in feces or urine. In this study, a preliminary analysis of the prevalence in the environment and the potential usefulness as source-tracking tools of human and animal adenoviruses and polyomaviruses has been developed. Molecular assays based on PCR specifically targeting human adenoviruses (HAdV), porcine adenoviruses (PAdV), bovine adenoviruses (BAdV), and bovine polyomaviruses (BPyV) were applied to environmental samples including urban sewage, slaughterhouse, and river water samples. PAdV and BPyV were detected in a very high percentage of samples potentially affected by either porcine or bovine fecal contamination, respectively. However, BAdV were detected in only one sample, showing a lower prevalence than BPyV in the wastewater samples analyzed. The 22 slaughterhouse samples with fecal contamination of animal origin showed negative results for the presence of HAdV. The river water samples analyzed were positive for the presence of both human and animal adenoviruses and polyomaviruses, indicating the existence of diverse sources of contamination. The identities of the viruses detected were confirmed by analyses of the amplified sequences. All BPyV isolates showed a 97% similarity in nucleotide sequences. This is the first time that PAdV5, BAdV6, and BPyV have been reported to occur in environmental samples. Human and porcine adenoviruses and human and bovine polyomaviruses are proposed as tools for evaluating the presence of viral contamination and for tracking the origin of fecal/urine contamination in environmental samples.

An in-line SPE strategy to enhance sensitivity in CE for the determination of pharmaceutical compounds in river water samples

2011 ◽  
Vol 32 (16) ◽  
pp. 2114-2122 ◽  
Author(s):  
Irene Maijó ◽  
Francesc Borrull ◽  
Marta Calull ◽  
Carme Aguilar
Keyword(s):  
River Water ◽  
Water Samples ◽  
Pharmaceutical Compounds ◽  
River Water Samples

scholarly journals Liquid Core Waveguide Spectrophotometry for the Sensitive Determination of Nitrite in River Water Samples

2006 ◽  
Vol 22 (7) ◽  
pp. 1017-1019 ◽  
Author(s):  
Hiromi TAKIGUCHI ◽  
Azusa TSUBATA ◽  
Makoto MIYATA ◽  
Tamao ODAKE ◽  
Hiroki HOTTA ◽  
...  
Keyword(s):  
River Water ◽  
Water Samples ◽  
Liquid Core ◽  
River Water Samples ◽  
Liquid Core Waveguide ◽  
Sensitive Determination
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