Chemistry Reference
In-Depth Information
350
0.6
300
0.5
250
0.4
200
0.3
150
0.2
100
0.1
50
0
0
Date
(a)
0.50
250
0.45
0.40
200
0.35
0.30
150
0.25
0.20
100
0.15
0.10
50
0.05
0
0
Date
(b)
fIgure 14.2
Atrazine levels in the Humber River area. Comparison of the concentration
of simazine and river discharge over one annual cycle for (a) River Trent at Cromwell Lock,
and (b) River Aire at Beale.
, Simazine concentration;
, river discharge. (From House et
al. [1977]. With permission.)
phenoxyalkanoic acids were also detected. Concentrations were generally low, but
levels of the following herbicides were detected up to maximum values (μg/liter),
which are given in parentheses.
Diuron (< 8.7)
Chlortoluron (< 0.67)
Mecoprop (< 8.2)
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