Determination of the Odor Threshold Concentrations Of Iodinated Trihalomethanes in Drinking Water

2001 ◽  
Vol 49 (4) ◽  
pp. 1881-1884 ◽  
Author(s):  
Beatriz Cancho ◽  
Cristina Fabrellas ◽  
Alfredo Diaz ◽  
Francesc Ventura ◽  
M Teresa Galceran
Keyword(s):  
Drinking Water ◽  
Odor Threshold

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Flavor Profile Analysis and GC/MS Detection of Phenolic Iodinated Disenfection Byproducts in Drinking Water for the USA Space Program

1999 ◽  
Vol 40 (6) ◽  
pp. 45-51 ◽  
Author(s):  
Andrea M. Dietrich ◽  
Susan Mirlohi ◽  
Willian F. DaCosta ◽  
Jennifer Peters Dodd ◽  
Richard Sauer ◽  
...  
Keyword(s):  
Drinking Water ◽  
Potable Water ◽  
Profile Analysis ◽  
Major Product ◽  
Space Program ◽  
Odor Threshold ◽  
Odor Evaluation ◽  
The Usa ◽  
Flavor Profile Analysis ◽  
Flavor Profile

Reactions of iodine and phenol were investigated to determine which iodophenols were produced and their odor properties. The research was performed in support of the USA space program that applies iodine to disinfect potable water for spacecraft use. Higher concentrations (50 mg/l) and higher iodine:phenol (e.g. 10:1) ratios resulted in the formation of greater iodophenol concentrations and higher substituted iodophenols. The reactions were fast and nearly complete within 1 hour. For pH 5.5 and 8 and all iodine:phenol ratios, formation of monosubstituted compounds indicated that 2-iodophenol was favored over 4-iodophenol. At the intermediate iodine:phenol ratios of 1:1 and 2:1, substantial amounts of the diiophenols formed and persisted for up to 32 days. The diiodophenols were not detected at iodine:phenol ratios of 0.2:1 and 10:1. The compound 2,4,6-triiodophenol was the major product formed at a 10:1 iodine:phenol ratio and the formation of this trisubstituted phenol appeared nearly complete. Odor evaluation indicated that the iodophenols have much lower odor threshold concentrations (OTC) than phenol. The 2- and 4- iodophenol had OTC values of ≅ 1 and 500 μg/l, respectively, with odors described as “medicinal, phenol, chemical”.

Determination of Hg(II) in drinking water by atomic absorption spectrometry - Cold vapour method after concentration by column extraction chromatography

1984 ◽  
Vol 49 (5) ◽  
pp. 1134-1139 ◽  
Author(s):  
Zdeněk Šmejkal ◽  
Jitka Tauferová ◽  
Mária Madová ◽  
Zlatica Teplá
Keyword(s):  
Drinking Water ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Extraction Chromatography ◽  
Absorption Spectrometry ◽  
Average Yield ◽  
Water Mains ◽  
Cold Vapour ◽  
Column Extraction

The method describes concentration of mercury in samples of drinking water from water mains with Hg concentration above 1.0 . 10-7 g l-1 (5.0 . 10-10mol l-1) by means of extraction chromatography on a column packed with a carrier Synachrom E-5 wetted with saturated solution of bis(diethyldithiocarbamate)copper(II) complex in 1 : 1 mixture 1,2-dichlorobenzene + cyclohexane. After elution with 3.0 mol l-1 HCl the mercury concentration in the eluate is determined by atomic absorption spectrometry - cold vapour method. Average yield of the mercury separation from the model solutions was 95.8%.

Multi-Array Wax Paper-Based Platform for the Pre-Concentration and Determination of Silver Ions in Drinking Water

Talanta ◽  
2021 ◽  
pp. 122474
Author(s):  
Neda Bagheri ◽  
Stefano Cinti ◽  
Eleonora Nobile ◽  
Danila Moscone ◽  
Fabiana Arduini
Keyword(s):  
Drinking Water ◽  
Silver Ions

Optimization of Removal of 2-methylisoborneol from Drinking Water using UV/H2O2

2016 ◽  
Vol 19 (1) ◽  
Author(s):  
Fengxun Tan ◽  
Haihan Chen ◽  
Daoji Wu ◽  
Nan Lu ◽  
Zhimin Gao
Keyword(s):  
Drinking Water ◽  
Conventional Treatment ◽  
Advanced Oxidation ◽  
Odor Threshold ◽  
Treatment Processes ◽  
Advanced Oxidation Technology ◽  
Oxidation Technology

Abstract2-methylisoborneol (2-MIB) is a common odor-causing compound in drinking water with a low odor threshold (10 ng/L). Since conventional treatment processes cannot effectively remove it, this study investigated an advanced oxidation technology: UV/H

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