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English summary
The analytical chemical authority control of pesticide products on the
Danish market performed in 2002 is reported. Samples of selected groups of pesticides have been collected from the market and analysed to verify whether the actual contents of the respective active ingredients in the products comply with the labelled content. The tolerance of deviation from the labelled content of active ingredient is set by the Danish Statutory order on pesticides.
Four different groups of products covered by the pesticide regulation were included in the 2002 analytical chemical authority control: 1) Herbicides containing ethofumesate, phenmedipham, desmedipham, terbuthylazine and pyridate. 2) Fungicides containing tebuconazole. 3) Insecticides containing buprofezin, chlorpyrifos and dimethoate. 4) Rodenticides containing brodifacoum and difenacoum.
Satisfactory results were found for herbicides containing pyridate,
desmedipham and ethofumesate, for insecticides containing buprofezin,
and for rodenticides containing difenacoum. Thus, the seventeen
analysed samples of these formulations complied with the accepted
tolerance limits with respect to the content of the active ingredient
as specified in Danish Statutory Order on pesticides.
One out of the three products containing terbuthylazine did not
comply with the tolerance limit for content of this active ingredient.
The product had a shelf life less than 2 years, which did not appear
from the label. The limited shelf life could be the reason for the low
content.
The content of active ingredient in one of the four products containing
dimethoate was found to be outside the tolerance limit. The
product controlled was from 1994, which can be the reason.
Two of the six products containing chlorpyrifos were found to be
outside the tolerance limit. The content of the active ingredient was
too low compared with the declared content. One of the products
was from 1998, while problems with precipitation in the other could
be the reason.
One of the four products containing brodifacoum was found to be
outside the tolerance limit with respect to content of active ingredient.
The content was found to be just outside the tolerance limit by
NERI, but just inside by the company.
Two out of the seven products containing phenmedipham and one
out of the seven products containing tebuconazole did not comply
with the tolerance limit for the content of the respective active ingredients.
The contents of active ingredients were too low.
On seven products the content of active ingredient were declared
only in g/L, but not in % (w/w) as required by the Statutory Order.
Declared content expressed in % (w/w) did not agree with the content
expressed in g/L on labels of two products containing chlorpyrifos.
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