drinking water sampling Articles
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Chemical analysis of drinking water from some communities in the Brong Ahafo region
This study consisted of the determination of the trace metals and some physiochemical properties in drinking water samples from the Brong Ahafo region of the Republic of Ghana, where drinking water samples are not treated before it is consumed. The purpose was to ascertain the quality of water from these sources. Samples were taken from fifteen sampling points and analyzed for the following ...
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Bacteriological quality of drinking water at point of use and hand hygiene of primary food preparers: implications for household food safety
Quality of water for consumption and food processing activities is universally accepted as an essential component to ensure food safety at household (HH) level. Along with safe water, hand hygiene is also an important factor for reducing diarrheal illnesses. This was a cross-sectional study conducted in rural and urban HHs to detect hygiene indicators in drinking water samples at point of use ...
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High frequency of
Helicobacter pylori DNA in drinking water in Kermanshah, Iran, during June–November 2012To gain a better understanding of transmission and selecting appropriate measures for preventing the spread of Helicobacter pylori, the aim of this study was to investigate the prevalence of H. pylori in drinking water samples in Kermanshah, Iran. Drinking water samples were collected from around Kermanshah and filtered through 0.45 μm nitrocellulose filters. The bacterial sediment was ...
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Activity concentration and dose estimation of 226Ra, 232Th, 40K and 137Cs in drinking water of selected areas of Punjab, Pakistan
Radioactivity of naturally occurring (226Ra, 232Th and 40K) and anthropogenic (137Cs) radioactive nuclides was measured in 29 potable ground and surface water samples of Punjab, Pakistan. The results showed average activity concentrations for 226Ra, 232Th, 40K and 137Cs as 1.09, 0.55, 16.17 and 0.40 Bql−1, respectively. 137Cs was detected in only a few samples. The obtained results showed ...
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New electrochemical sensor for sensitive quantification of copper in river, city, bottled and drinking water samples
In the present study, a reliable and very sensitive sensor for the determination of ultra-trace of Cu(II) is proposed. Copper was determined by anodic differential pulse stripping voltammetry based on the adsorption collection of the Cu(II) on an encapsulated Schiff base onto multiwalled carbon nanotube paste working electrode. The variation of peak current with pH and several instrumental ...
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Age-dependent annual effective dose estimations of 226Ra, 232Th, 40K and 222Rn from drinking water in Baling, Malaysia
Natural radioactivity and radon concentration were studied in drinking water samples from Baling area, Kedah, Malaysia, using HPGe and RAD-7 detectors, respectively. Average concentrations obtained for 226Ra, 232Th, 40K and 222Rn were 44.2 ± 3.9, 38.1 ± 5.0, 140.9 ± 10.6 mBq l−1 and 5.7 ± 0.68 Bq l−1, respectively. Cumulative annual effective doses due to ingestion of 226Ra, 232Th, 40K and ...
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Analysis of Epichlorohydrin in Drinking Water by Purge and Trap GC/MS
Abstract Epichlorohydrin (ECH) is a versatile starting material in the production of drugs and polymers. It is also used as an insect fumigant and a solvent for organic synthesis reactions. ECH-based polymer pipes are widely employed in the production of drinking water. Due to its extreme reactivity and toxicity, many foreign nations have begun imposing limits on the amount of ECH allowable in ...
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Comparative study of physico-chemical parameters of drinking water from some longevity and non-longevity areas of China
There is an obvious regional longevity phenomenon in China and many longevity counties are located in South China. This study was carried out to find the characteristics of elemental contents of drinking water in longevity areas in South China and the differences to non-longevity areas in China. A total of 128 drinking water samples were collected from longevity areas in South China (n = 40), ...
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The determination of mercury at ultratrace levels using FIMS and amalgamation technique
The PerkinElmer Flow Injection Mercury System (FIMS) is used in combination with an amalgama¬tion preconcentration technique to determine Hg at ultratrace concentrations. Using a 10-mL sample volume, the instrumental detection limit is 0.3 ng/L. The method detection limit obtained in drinking water is 1.0 ng/L with a spike recovery of 100 ± 4%. The operating conditions for the ...
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New technique for direct fluoroimmunomagnetic detection of rotavirus in water samples
A new rapid, sensitive and selective method for rotavirus detection in water samples is described in this paper. Amino pink magnetic microparticles were functionalized with monoclonal antibodies and used to capture, concentrate, separate and detect infectious rotavirus particles in distilled and drinking water samples. The fluorescence of the microparticles was used to determine the ...
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Removal of arsenic from drinking water using modified fly-ash bed
The removal of arsenic from drinking water by filtration through modified fly-ash bed is discussed. The preparation and characteristics of the bed material and the effects of different parameters like pH and the presence of other constituents are described. Various arsenic compounds in synthetic mixtures as well as drinking water samples containing arsenic have been investigated. The ...
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Ensuring safe drinking water case study
Challenge: A state environmental agency contracted with Antea Group to assist in the execution of a state-wide clean drinking water program. Program objectives included the development of an efficient and standardized program to monitor for chemical and biological contaminants across more than 6,500 public water systems. Solution: Antea Group developed a comprehensive sample ...
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Impact of plumbing age on copper levels in drinking water
Theory and practical experiences suggest that higher copper levels in drinking water tap samples are typically associated with newer plumbing systems, and levels decrease with increasing plumbing age. Past researchers have developed a conceptual model to explain the ‘aging effect’ founded in the proposed evolution of copper(II) corrosion by-products on the pipe surface, based on theoretical ...
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Risk assessment of haloacetic acids in the water supply of Tehran, Iran
Disinfection by-products are compounds occurring in drinking water as a result of reactions between disinfectants and impurities in raw water, and their occurrence has been a public health concern for the last four decades. Haloacetic acids (HAAs) are one of the major by-products of chlorination. The concentration and variation of HAAs was monitored in 540 samples taken from tap water in six ...
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Improved Purge-Trap/GC Analysis of Volatiles in Drinking Water by US EPA Method 524.2
The VOCARB 3000 adsorbent trap is suitable for monitoring volatile organic compounds in drinking water samples, as well as in wastewater and hazardous waste samples. This adsorbent trap meets the requirements of US EPA Methods 502 and 524.2. Relative standard deviation values were less than 15% for all of the compounds listed, and less than 7% for most of the compounds. Recovery of each ...
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Analysis of physico-chemical and bacteriological quality of drinking water in Mafikeng, South Africa
Mafikeng, the capital of the North West Province, receives water from two sources, namely the Molopo eye and the Modimola dam. Once treated, the potable water is mixed and supplied to the city via distribution systems. This study was designed to assess the quality of drinking water in Mafikeng and also to determine whether the water from the two sources has an impact on the mixed water ...
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Radon levels in different types of bottled drinking water and carbonated drinks in Iraqi markets
In the present work, radon concentration was measured for different types of bottled drinking water and carbonated drink samples that are available in Iraqi markets. Radon measurements were carried out using a RAD-7 electronic radon detector. Annual effective dose was also calculated. The measured radon concentration in samples of bottled drinking water ranged from 0.0354 to 0.248 Bq/l with a ...
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Mold Odor Analysis Using a Purge and Trap Multimatrix Autosampler
Abstract Taste and odor are widely associated with drinking water quality. Musty odors, caused by compounds such as geosmin and 2-methylisoborneol (MIB), may lead consumers to believe their water is unsafe. These compounds are byproducts of the growth of blue-green algae and other microbes. Since consumers rely on taste and odor as primary indicators for water safety, water suppliers take steps ...
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Challenges in addressing variability of lead in domestic plumbing
Current data indicates that lead exposure is of concern even at low concentrations. Corrosion is an important problem in drinking water because it can affect public health due to leaching of lead or other metals into the drinking water. For this reason, a corrosion control program is an important measure to help mitigate exposure to lead in drinking water. The biggest challenge that remains in ...
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The predictive value of total coliforms in drinking water using life table analysis
Total coliform monitoring in distribution systems is no longer a required parameter in many countries but is still mandated in Canada and the USA. The value of reporting total coliform results in drinking water is a topic of debate. Total coliform and Escherichia coli results from small drinking water systems tested over a 3-year period in British Columbia were analyzed using life table ...
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