2006
DOI: 10.1590/s0100-46702006000300009
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Sensitive spectrophotometric determination of lansoprazole in pharmaceuticals using ceric ammonium sulphate based on redox and complex formation reactions

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Cited by 6 publications
(1 citation statement)
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“…A number of colour formation reactions utilizing different reagents have been employed for the visible spectrophotometric determination of LAN in pharmaceuticals [4,12,40,[44][45][46][47][48][49][50][51][52][53][54][55][56]. The reported methods are based on complexation and oxidative coupling [44], formation of a charge-transfer complex [4,45], redox followed by complexation or colour bleaching [46][47][48][49], bromination [50], ion-pair complexation reaction [51][52][53][54][55] and coupling with diazotized p-nitroaniline [56]. However, most of the reported visible spectrophotometric methods suffer from one or more disadvantages, such as poor sensitivity [4,44,45], a narrow range of determination [47][48][49][50], use of a heating step [44,48], and use of an extraction step [52][53][54][55], as shown in Table 1.…”
Section: Introductionmentioning
confidence: 99%
“…A number of colour formation reactions utilizing different reagents have been employed for the visible spectrophotometric determination of LAN in pharmaceuticals [4,12,40,[44][45][46][47][48][49][50][51][52][53][54][55][56]. The reported methods are based on complexation and oxidative coupling [44], formation of a charge-transfer complex [4,45], redox followed by complexation or colour bleaching [46][47][48][49], bromination [50], ion-pair complexation reaction [51][52][53][54][55] and coupling with diazotized p-nitroaniline [56]. However, most of the reported visible spectrophotometric methods suffer from one or more disadvantages, such as poor sensitivity [4,44,45], a narrow range of determination [47][48][49][50], use of a heating step [44,48], and use of an extraction step [52][53][54][55], as shown in Table 1.…”
Section: Introductionmentioning
confidence: 99%