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char = p;code = 112
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result sql = Application of Chemcatcher passive sampler for monitoring levels of mercury in contaminated river water.
Application of Chemcatcher passive sampler for monitoring levels of mercury in contaminated river water.
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char = 7;code = 55
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char = H;code = 72
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char = h;code = 104
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char = u;code = 117
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char = o;code = 111
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char = l;code = 108
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char = e;code = 101
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char = e;code = 101
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char = c;code = 99
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char = t;code = 116
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char = g;code = 103
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char = n;code = 110
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char = ;code = 32
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = d;code = 100
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char = t;code = 116
char = e;code = 101
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char = t;code = 116
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char = o;code = 111
char = n;code = 110
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char = i;code = 105
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char = o;code = 111
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char = c;code = 99
char = e;code = 101
char = s;code = 115
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char = w;code = 119
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = n;code = 110
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result sql = A passive sampler (Chemcatcher) consisting of a 47 mm Emporetrade mark chelating disk (CHE) with iminodiacetic groups as the receiving phase overlaid with a diffusion membrane was developed and calibrated for the monitoring of Hg in water. Three different diffusion membranes including cellulose acetate (CA), polyethersulphone (PS) and cellulose dialysis membrane (D) were tested. The best performance was obtained with the CHE-PS tandem. The effective sampling rate of the device (R(s), L day(-1)) is defined as the equivalent volume of water extracted per unit time, and is analyte specific and can be determined experimentally in a flow-through tank. Effects of water temperature and turbulence on the uptake rate of Hg were assessed under controlled laboratory conditions. Sampling rates were in the range of 0.029-0.091 L day(-1). An increase in sampling rate with turbulence was demonstrated. The detection limit of the sampler obtained in flowing waters ranged between 2.2 and 2.9 ng L(-1)Hg. The performance of Chemcatcher was tested alongside spot water sampling in a 14-day field deployment at two locations on the Valdeazogues River, Almadén, Spain. In general, the Hg concentration estimated by the Chemcatcher was lower than that found in spot water samples collected over the same period. This may be explained by the behaviour of this sampler that measures only the labile fraction of Hg in water, and this will exclude some species. However, Chemcatcher preconcentrates Hg allowing its determination in some places where its concentration is below the detection limit of spot sampling.

Publication: Talanta 2009 Feb 15 ;77(4)::1483-9. :doi: 10.1016/j.talanta.2008.09.037.
Publication Date: 2009 Feb 15
Study Author(s): Aguilar-Martínez, Rocío;Gómez-Gómez, M Milagros;Greenwood, Richard;Mills, Graham A;Vrana, Branislav;Palacios-Corvillo, María A;
Institution: Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria, 28040 Madrid, Spain.
Shortcut link to this study:
A passive sampler (Chemcatcher) consisting of a 47 mm Emporetrade mark chelating disk (CHE) with iminodiacetic groups as the receiving phase overlaid with a diffusion membrane was developed and calibrated for the monitoring of Hg in water. Three different diffusion membranes including cellulose acetate (CA), polyethersulphone (PS) and cellulose dialysis membrane (D) were tested. The best performance was obtained with the CHE-PS tandem. The effective sampling rate of the device (R(s), L day(-1)) is defined as the equivalent volume of water extracted per unit time, and is analyte specific and can be determined experimentally in a flow-through tank. Effects of water temperature and turbulence on the uptake rate of Hg were assessed under controlled laboratory conditions. Sampling rates were in the range of 0.029-0.091 L day(-1). An increase in sampling rate with turbulence was demonstrated. The detection limit of the sampler obtained in flowing waters ranged between 2.2 and 2.9 ng L(-1)Hg. The performance of Chemcatcher was tested alongside spot water sampling in a 14-day field deployment at two locations on the Valdeazogues River, Almadén, Spain. In general, the Hg concentration estimated by the Chemcatcher was lower than that found in spot water samples collected over the same period. This may be explained by the behaviour of this sampler that measures only the labile fraction of Hg in water, and this will exclude some species. However, Chemcatcher preconcentrates Hg allowing its determination in some places where its concentration is below the detection limit of spot sampling.
PMID: 19084668

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