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Table 3 Selectivity coefficients (KpotDRZ+) For DRZ-PM/silica electrode by a separate solution method (10−3 mol·L−1 dorzolamide hydrochloride)

From: Electrochemically-selective electrode for quantification of dorzolamide in bulk drug substance and dosage form

Interferent

(1 × 10−3 mol L−1)

KPotDRZ+

Na+

− 0.8377

K+

− 0.631

Ca2+

− 0.4368

Cu2+

− 0.5289

Fe3+

0.797

glycine

− 1.375

aminopencillic acid

− 1.059

Timolol maleate

− 0.311

Benzalkonium Cl

0.184

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BMC Chemistry

ISSN: 2661-801X

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