2014
DOI: 10.5935/0103-5053.20140096
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A Simple and Efficient Method for Derivatization of Glyphosate and AMPA Using 9-Fluorenylmethyl Chloroformate and Spectrophotometric Analysis

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Cited by 18 publications
(16 citation statements)
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“…The influence of 0.2molL -1 BBS volume (1.0 to 2.5ml) on the nucleophilic substitution reaction was investigated, the absorbance increase with increasing of buffer volume which promotes the amine group reactivity and stabilize the solubility of derivatization product in the acetonitrile (31). it has been found that 2.0ml is the optimum volume to achieve maximum buffering capacity and facilitate the substitution.…”
Section: Effect Of the Buffer Volumementioning
confidence: 99%
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“…The influence of 0.2molL -1 BBS volume (1.0 to 2.5ml) on the nucleophilic substitution reaction was investigated, the absorbance increase with increasing of buffer volume which promotes the amine group reactivity and stabilize the solubility of derivatization product in the acetonitrile (31). it has been found that 2.0ml is the optimum volume to achieve maximum buffering capacity and facilitate the substitution.…”
Section: Effect Of the Buffer Volumementioning
confidence: 99%
“…The result revealed that at lower concentration decrease the probability of the reaction, so lower absorbance attained. As increasing the concentration, the absorbance increases and reach the maximum at 20.0µg/mL where the reaction is completed, then decreases due to hydrolysis reaction of excess reagent that convert to FMOC-OH 31 (Figure 3c).…”
Section: Effect Of Fmoc-cl Concentrationmentioning
confidence: 99%
“…The RNH has two amine groups that cause absorption in the ultraviolet at 228, 314 nm as shown in Fig.2a. FMOC-Cl in the pure solvent had a sharp absorption band in the UV-Vis range 24 . It was observed that 15 μg/mL FMOC-Cl in the reaction medium without the analyte (RNH) provided a spectrum containing two regions of high absorbance (206 and 255 nm) as shown in Fig.…”
Section: Spectral Behavior In the Derivatizationmentioning
confidence: 99%
“…A análise de glifosato e AMPA em solo via HPLC-MS/MS preconiza a adoção de uma etapa de derivatização na preparação da amostra, pois são moléculas que possuem baixo peso molecular, alta polaridade, caráter anfótero, ausência de grupos cromóforos e existe uma dificuldade de separá-lo e aplicar parâmetros cromatográficos adequados a partir de técnicas cromatográficas como a cromatografia a gás, cromatografia líquida e equipamentos com detecção por ultravioleta -visível (UV-vis) (STEINBORN et al, 2016;CATRINCK et al, 2014;FARIA, 2013;BÖRJESSON et al, 2000;PATSIAS et al, 2001).…”
Section: Derivatizaçãounclassified