Micro-organic herbicides data from rivers [LOIS]

Micro-organic herbicide levels in river water for various sites within the Humber and Tweed catchments collected as part of the Land Ocean Interaction Study project (LOIS). The dataset contains data for Phenyl urea and Phenoxy acid herbicides, measured as 2,4-Dichlorophenoxyacetic acid, 4-(4-Chloro-O-tolyloxy) butyric acid, 4-Chloro-O-tolyloxyacetic acid, Chlorotoluron dissolved, Diuron dissolved, Isoproturon dissolved, Linuron dissolved, Mecoprop dissolved. Phenyl urea herbicide data is available for twelve sites in the Humber catchment within 1994 to 1995 and 1994 to 1997 and for three sites on the Tweed catchment within 1995. Phenoxy acid herbicide data is available for six sites (S1, U3, N4, W5 and O6) over the period December 1994 to September 1995, for 7 sites (S2, D7, A8, C9, D10, T11 and O12) over the period December 1994 to February 1997 and 3 sites (TW13, TW14 and TW15) over the period January 1995 to September 1995. Attempts were made to sample the sites at weekly intervals. However sampling was halted for short periods when it was not possible to process the samples quickly. Linuron dissolved was only measured from April 1994 - October 1994. Samples were collected in chromic acid-washed 1 litre glass bottles. Herbicide levels were concentrated before being measured using High Performance Liquid Chromatography for Phenyl urea herbicides and Gas Chromatography for Phenoxy acid herbicides. Until November 1994, analysis was completed by the York University and the Institute for Freshwater Ecology, Wareham, laboratories. From December 1994 onwards the samples were dispatched to the Institute for Hydrology, Wallingford, for extraction and analyses. Full details about this dataset can be found at https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a

Identification info

Metadata Language: English (en)

Character set: utf8

Dataset Reference Date (): 2013-07-01

Dataset Reference Date (): 2000-01-01

Identifier: CEH:EIDC: / 1373029956118

Identifier: https://catalogue.ceh.ac.uk/id/e28ffc01-880d-423f-acb6-879b9fd4603a

Identifier: doi: / 10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a

Other citation details: Bhardwaj, C.L., Dodd, J.C., Bachiller-Jareno, N., Tindall, I., Moore, R. (2013). Micro-organic herbicides data from rivers [LOIS]. NERC Environmental Information Data Centre 10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a

UK Centre for Ecology & Hydrology

Centre for Ecology & Hydrology - Bhardwaj, C.L.

Centre for Ecology & Hydrology - Dodd, J.C.

Centre for Ecology & Hydrology - Bachiller-Jareno, N.

Centre for Ecology & Hydrology - Tindall, I.

Centre for Ecology & Hydrology - Moore, R.

NERC EDS Environmental Information Data Centre

NERC Environmental Information Data Centre

UK Centre for Ecology & Hydrology

Maintenance and update frequency: notPlanned

Maintenance note: Programme is finished

GEMET - INSPIRE themes, version 1.0 ()

Environmental Monitoring Facilities

GeoNames

England

Keywords

Water quality
water quality
Phenyl urea
Phenoxy acid
herbicide
2-4-Dichlorophenoxyacetic acid
4-(4-Chloro-O-tolyloxy) butyric acid
4-Chloro-O-tolyloxyacetic acid
Chlorotoluron
Diuron
Isoproturon
Linuron
Mecoprop
Land Ocean Interaction Study
LOIS
Humber
Swale
Derwent
Aire
Calder
Trent
Ouse
Nidd

Limitations on Public Access: otherRestrictions

Other constraints: no limitations

Use constraints: otherRestrictions

Other constraints: This resource is made available under the terms of the Open Government Licence

Use constraints: otherRestrictions

Other constraints: © UK Centre for Ecology & Hydrology

Use constraints: otherRestrictions

Other constraints: If you reuse this data, you should cite: Bhardwaj, C.L., Dodd, J.C., Bachiller-Jareno, N., Tindall, I., Moore, R. (2013). Micro-organic herbicides data from rivers [LOIS]. NERC Environmental Information Data Centre https://doi.org/10.5285/e28ffc01-880d-423f-acb6-879b9fd4603a

Spatial representation type: textTable

Topic category

Environment

Begin date: 1993-09-07

End date: 1997-10-29

Code: OSGB 1936 / British National Grid

Distribution Information

Data format

Comma-separated values (CSV) ()

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Supporting information available to assist in re-use of this dataset.

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Resource Locator: Supporting information
Supporting information available to assist in re-use of this dataset.

Quality Scope: dataset

Other: dataset

Report

Dataset Reference Date (): 2010-12-08

Statement: Phenyl urea herbicides were concentrated by using one of the following methods: solid phase extraction (SPE) using C18 (1gm, 6ml) (EC) (ISOLUTE) cartridges and eluting with ethyl acetate; as previous method except that the dried cartridge after loading was washed with 6ml of methanol: water:: 1:1 (to remove the impurities) before eluting the herbicides with methanol; liquid-liquid extraction with dichloromethane. Phenoxy acid herbicides were concentrated using liquid-liquid extraction with dichloromethane. Phenyl urea herbicides were measured by High Performance Liquid Chromatography (HPLC) with detection by a UV/VIS detector and phenoxy acid herbicides by Gas Chromatography (GC) with detection by a mass selective detector (GS-MS). One sample from each batch was randomly spiked with a mixed standard of urea and acid herbicides for comparison purposes. For all determinands certified grade standards of purity >99% were used. The laboratory at Wallingford takes part in WRC's AQUACHECK inter-laboratory harmonisation exercise for urea and acid herbicides. Data quality for both groups of herbicides is variable because of the nature of samples (Aire, Calder, Don and Trent were found to be highly polluted resulting in complex chromatograms), the level of herbicides present (mostly they are close to the detection limit) and difficulties in extraction especially in liquid-liquid extraction where they formed emulsions. A zip file of box-and-whisker plots are available for each determinand, showing the range of values (median, inter-quartile range, 1.5 * inter-quartile range, outliers) recorded at each site to enable prospective users to understand data quality.

Metadata

File identifier: e28ffc01-880d-423f-acb6-879b9fd4603a XML

Metadata Language: English (en)

Character set: ISO/IEC 8859-1 (also known as Latin 1)

Resource type: dataset

Hierarchy level name: dataset

Metadata Date: 2022-05-20T10:40:52

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Environmental Information Data Centre

Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK

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