Simultaneous determination of nine food additives using high-performance liquid chromatography

Enzymic Method for the Spectrophotometric Determination of Benzoic Acid in Soy Sauce and Pickles

“…For a comparison study, 10 mm 3 of the sample solution prepared as described above were analysed according to the method of Ikai et al 11…”

“…The proposed method was compared with an HPLC method. 11 Five positive samples (two kinds of soy sauce, scallion, Japanese radish and cucumber soaked in soy sauce) analysed by the proposed method (see Table 4) were used for this comparison, and the results obtained by HPLC are also given in Table 4. The linear regression equation was obtained by the least-squares method and was found to be y = 0.901x + 0.08, where x and y represent the results given by HPLC and the proposed method, respectively.…”

Investigation of sorbic acid volatile degradation products in pharmaceutical formulations using static headspace gas chromatography

“…The preservatives used in pharmaceuticals are strictly controlled by the respective regulatory organizations, preferring specific test methods for preservatives. There have been several methods published for the determination of the sorbic acid content in pharmaceutical and food preparations using different analytical techniques such as iodometric titration [17], polarimetry [18], UV-vis spectrometry [19][20][21][22], thinlayer chromatography [23], liquid chromatography [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39], gas chromatography [40][41][42][43][44][45][46][47][48][49] and capillary electrophoresis [50][51][52][53][54][55]. For the investigation of the degradation products in the past, the analytical techniques used were: UV spectroscopy and thin-layer chromatography (TLC).…”

A novel gradient HPLC method for simultaneous determination of ranitidine, methylparaben and propylparaben in oral liquid pharmaceutical formulation

“…For the determination of parabens in food, cosmetics and pharmaceutical formulations, the most commonly used analytical column is C18 [12][13][14][15][16][17][18][19][20]. The use of cyano column has also been reported [5,21].…”