Uranium analyses of ground- and surface-water samples collected by the U.S. Geological Survey during 1954-56

A two-year surface water reconnaissance of the Bogue Phalia and its tributaries was conducted in 1997 and 1998. Cyanazine and metolachlor in surface water samples were quantified using enzyme-linked immunosorbent assays (ELISA). Cyanazine and metolachlor were detected in 101 and 132 of 160 samples, respectively. Cyanazine concentrations ranged from 0.1 to 2.2 g L−1and exceeded the U.S. Environmental Protection Agency (EPA) lifetime health advisory level (HAL) of 1 g L−1in eight samples. However, concentrations never exceeded the HAL for shorter exposure times. Metolachlor concentrations never reached the lifetime HAL of 100 g L−1. Metolachlor concentrations ranged from 0.1 to 20.6 g L−1. Metolachlor was detected more frequently and found to be more persistent throughout the growing season than was cyanazine. Higher cyanazine and metolachlor concentrations were detected at sampling dates that coincided with herbicide applications. One of the Bogue Phalia's tributaries, Clear Creek, was found to be a point-source of cyanazine for the watershed.

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U.S. Geological Survey protocol for the collection and processing of surface-water samples for the subsequent determination of inorganic constituents in filtered water

Open-File Report ◽

10.3133/ofr94539 ◽

1994 ◽

Cited By ~ 25

Author(s):

Arthur J. Horowitz ◽

C.R. Demas ◽

K.K. Fitzgerald ◽

T.L. Miller ◽

D.A. Rickert

Keyword(s):

Surface Water ◽

Water Samples ◽

Geological Survey ◽

Subsequent Determination ◽

Inorganic Constituents ◽

Survey Protocol ◽

Surface Water Samples

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Surface Water Quality-Assurance Plan for the North Florida Program Office of the U.S. Geological Survey

Open-File Report ◽

10.3133/ofr00199 ◽

2000 ◽

Author(s):

Marvin A. Franklin

Keyword(s):

Water Quality ◽

Quality Assurance ◽

Surface Water ◽

Surface Water Quality ◽

Geological Survey ◽

The North ◽

The U.S

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Surface Water Quality-Assurance Plan for the Indiana District of the U.S. Geological Survey

Open-File Report ◽

10.3133/ofr03460 ◽

2003 ◽

Author(s):

James A. Stewart ◽

Donald V. Arvin

Keyword(s):

Water Quality ◽

Quality Assurance ◽

Surface Water ◽

Surface Water Quality ◽

Geological Survey ◽

The U.S

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Occurrence of 1,4-dioxane and MTBE in drinking water sources in Japan

Water Science & Technology Water Supply ◽

10.2166/ws.2006.049 ◽

2006 ◽

Vol 6 (2) ◽

pp. 47-53 ◽

Cited By ~ 5

Author(s):

D. Simazaki ◽

M. Asami ◽

T. Nishimura ◽

S. Kunikane ◽

T. Aizawa ◽

...

Keyword(s):

Drinking Water ◽

Surface Water ◽

Water Samples ◽

Quality Standards ◽

Raw Water ◽

Water Quality Standards ◽

Butyl Ether ◽

Water Treatment Plants ◽

Standard Value ◽

Surface Water Samples

Nationwide surveys of 1,4-dioxane and methyl-t-butyl ether (MTBE) levels in raw water used for the drinking water supply were conducted at 91 water treatment plants in Japan in 2001 and 2002, prior to the revision of the drinking water quality standards. 1,4-dioxane was widely and continuously detected in raw water samples and its occurrence was more frequent and its concentrations higher in groundwater than in surface water. However, its maximum concentration in raw water was much lower than its new standard value (50 μg/L), which was determined as a level of 10−5 excessive cancer risk to humans. Trace levels of MTBE were also detected in several surface water samples.

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Development of Surface Molecularly Imprinted Polymers as Dispersive Solid Phase Extraction Coupled with HPLC Method for the Removal and Detection of Griseofulvin in Surface Water

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17010134 ◽

2019 ◽

Vol 17 (1) ◽

pp. 134 ◽

Cited By ~ 1

Author(s):

Kamran Bashir ◽

Zhimin Luo ◽

Guoning Chen ◽

Hua Shu ◽

Xia Cui ◽

...

Keyword(s):

Surface Water ◽

Solid Phase Extraction ◽

Molecularly Imprinted Polymers ◽

Water Samples ◽

Solid Phase ◽

Phase Extraction ◽

Dispersive Solid Phase Extraction ◽

Molecularly Imprinted ◽

Imprinted Polymers ◽

Surface Water Samples

Griseofulvin (GSF) is clinically employed to treat fungal infections in humans and animals. GSF was detected in surface waters as a pharmaceutical pollutant. GSF detection as an anthropogenic pollutant is considered as a possible source of drug resistance and risk factor in ecosystem. To address this concern, a new extraction and enrichment method was developed. GSF-surface molecularly imprinted polymers (GSF-SMIPs) were prepared and applied as solid phase extraction (SPE) sorbent. A dispersive solid phase extraction (DSPE) method was designed and combined with HPLC for the analysis of GSF in surface water samples. The performance of GSF-SMIPs was assessed for its potential to remove GSF from water samples. The factors affecting the removal efficiency such as sample pH and ionic strength were investigated and optimized. The DSPE conditions such as the amount of GSF-SMIPs, the extraction time, the type and volume of desorption solvents were also optimized. The established method is linear over the range of 0.1–100 µg/mL. The limits of detection and quantification were 0.01 and 0.03 µg/mL respectively. Good recoveries (91.6–98.8%) were achieved after DSPE. The intra-day and inter-day relative standard deviations were 0.8 and 4.3% respectively. The SMIPs demonstrated good removal efficiency (91.6%) as compared to powder activated carbon (67.7%). Moreover, the SMIPs can be reused 10 times for water samples. This is an additional advantage over single-use activated carbon and other commercial sorbents. This study provides a specific and sensitive method for the selective extraction and detection of GSF in surface water samples.

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