A flow-cell optosensor for lead based on immobilized dithizone
1992; Elsevier BV; Volume: 39; Issue: 11 Linguagem: Inglês
10.1016/0039-9140(92)80132-w
ISSN1873-3573
AutoresWalace A. de Oliveira, Xiu‐Ping Yan,
Tópico(s)Electrochemical sensors and biosensors
ResumoDithizone immobilized on XAD-4 resin has been studied as a sensor element of an optical sensor for lead using a flow-cell. Using this arrangement, lead in solution has been determined in the concentration range 1 × 10−5−3 × 10−7M with a detection limit of 1 × 10−8M(i.e., 2 μg/l.). The standard deviation of the method for the measurement of lead at a concentration of 1 × 10−6M was found to be 7%. The response of the sensor was reproducible and can be regenerated using 0.01M hydrochloric acid followed by citrate-hydroxylamine solution.
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