2001
DOI: 10.1016/s0731-7085(00)00535-5
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Ion exchange chromatographic determination of olpadronate, phosphate, phosphite, chloride and methanesulfonic acid

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Cited by 17 publications
(7 citation statements)
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“…The use of chromatographic methods introduced several problems: 1) UV-Vis or fluorescent detection can not be used owing to lack of chromophores in the molecule; 2) conventional reversed-phase liquid chromatography (RP-HPLC) is not a good choice, because aminobisphosphonates are hydrophilic and ionized in the pH range used with reversed-phase silica based columns and strong metal chelating ability causes adsorption problems; 3) gas chromatography can not be used due to insufficient volatility of aminobisphosphonates. Several high-performance liquid chromatographic methods based on post-or precolumn derivatization of bisphosphonates have been developed [3][4][5][6][7][8][9][10][11]. For example, Ion-pair chromatography with massspectrometric [12], refractive index [13] and conductometric [14] detection have been proposed.…”
Section: Introductionmentioning
confidence: 99%
“…The use of chromatographic methods introduced several problems: 1) UV-Vis or fluorescent detection can not be used owing to lack of chromophores in the molecule; 2) conventional reversed-phase liquid chromatography (RP-HPLC) is not a good choice, because aminobisphosphonates are hydrophilic and ionized in the pH range used with reversed-phase silica based columns and strong metal chelating ability causes adsorption problems; 3) gas chromatography can not be used due to insufficient volatility of aminobisphosphonates. Several high-performance liquid chromatographic methods based on post-or precolumn derivatization of bisphosphonates have been developed [3][4][5][6][7][8][9][10][11]. For example, Ion-pair chromatography with massspectrometric [12], refractive index [13] and conductometric [14] detection have been proposed.…”
Section: Introductionmentioning
confidence: 99%
“…Na tentativa de elaborar procedimentos mais simples, alguns autores desenvolveram métodos para determinação de alendronato e outros bisfosfonados utilizando detecção indireta por ultravioleta. Estas metodologias baseiam-se na medida da diminuição da absorvância da fase móvel (contendo HNO 3 ) que ocorre pela presença do soluto (bisfosfonado) 31,32 . Em um dos estudos, foi empregado HNO 3 1,6 mmol/L como fase móvel, o comprimento de onda de 235 nm para leitura da absorvância e um detector com polaridade invertida.…”
Section: Tabela 1 Influência Do Contra-íon Na Retenção Dos Derivadosunclassified
“…(2) Alkyl sulfonic acids do not have a UV chromophore suitable for detection in LC. (3) Ion chromatography (IC), which is usually used for sulfonic acid determination [9][10][11], may not be employed when the sample matrix contains various ionic impurities. (4) In addition to LC methodologies, employment of headspace GC or GC-MS is not preferred because it requires sample pretreatment due to the poor volatility and strong acidity of sulfonic acids.…”
Section: Introductionmentioning
confidence: 99%