New
fully portable instrument for the versatile determination of cations
and anions by capillary electrophoresis with contactless conductivity
detection
A new portable capillary electrophoresis instrument with capacitively
coupled contactless conductivity detection was developed and optimized
for the sensitive field measurements of ionic compounds in environmental
samples. It is powered by batteries and the high voltage modules are
capable of delivering up to 15 kV at either polarity for more than one
working day. Inorganic cations and anions, including ions of heavy
metals and arsenate, could be determined with detection limits in the
range from about 0.2 to 1 mu M. The instrument was field tested in a
remote region of Tasmania and nitrite and ammonium could be determined
on-site at concentrations as low as 10 ppb in presence of other common
inorganic ions at concentrations which were 2 to 3 orders of magnitude
higher.
Mời bạn đọc xem tại đây: http://repository.vnu.edu.vn/handle/VNU_123/31052
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