Flow injection chemiluminescence determination of loxoprofen and naproxen with the acidic permanganate-sulfite system.
J Pharm Anal 2012;
1:51-56. [PMID:
29403682 PMCID:
PMC5760774 DOI:
10.1016/s2095-1779(11)70009-0]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 01/08/2011] [Indexed: 11/23/2022] Open
Abstract
A novel flow injection chemiluminescence (CL) method for the determination of loxoprofen and naproxen was proposed based on the CL system of KMnO4, and Na2SO3 in acid media. The CL intensity of KMnO4-Na2SO3 was greatly enhaneed in the presence of loxoprofen and naproxen. The mechanism of the CL reaction was studied by the kinetic proecss and UV-vis absorption and the conditions were optimized. Under optimized conditions, the CL intensity was linear with loxoprofen and naproxen concentration in the range of 7.0 × 10−8 – 1.0 × 10−5 g/mL and 2.0 × 10−7 – 4.0 × 10−6 g/mL with the detection limit of 2.0 × 10−8 g/mL and 3.0 × 10−8 g/mL (S/N = 3), respectively. Thc relative standard deviations were 2.39% and 1.37% for 5.0 × 10−7 g/mL naproxen and 5.0 × 10−7 g/mL loxoprofen (n = 10), respectively. The proposed method was satisfactorily applied to thc determination of loxoprofen and naproxen in pharmaceutical preparations.
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