Abstract
Beryllium(II) selective electrodes have been fabricated based on poly(vinyl chloride) (PVC) matrix membranes containing newly synthesized neutral carrier dibenzo(perhydrotriazino)aza-14-crown-4 ethers as ionophore. Best performance was exhibited by the membrane having a composition ionophore (IIa):PVC:sodium tetraphenylborate (NaTPB):tributyl phosphate (TBP) in the ratio (w/w; mg) of 5:30:3:65. This membrane worked well over a wide concentration range 7.6×10−6 to 1.0×10−1M of Be2+ with a Nernstian slope of 30.7mV per decade of beryllium activity. The response time of the sensor is 15s and the membrane can be used over a period of 4months with good reproducibility. The proposed electrode works well in a wide pH range 3.0–9.0. It was successfully applied to the determination of beryllium in a mineral sample.
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