High-performance Liquid Chromatography Study of the Nitration Course of Tetrabutoxycalix[4]arene at the Upper Rim: Determination of the Optimum Conditions for the Preparation of 5,11,17-Trinitro-25,26,27,28-tetrabutoxycalix[4]arene

2009 ◽  
Vol 27 (10) ◽  
pp. 2031-2036 ◽  
Author(s):  
Zhengyi Li ◽  
Jiejie Ma ◽  
Jiawen Chen ◽  
Yi Pan ◽  
Juli Qiang ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Optimum Conditions ◽  
Upper Rim

Separation and Determination of Some Aromatic Sulfones by Reversed-Phase High-Performance Liquid Chromatography

1994 ◽  
Vol 59 (3) ◽  
pp. 569-574 ◽  
Author(s):  
Josef Královský ◽  
Marta Kalhousová ◽  
Petr Šlosar
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Mobile Phase ◽  
High Performance ◽  
Reversed Phase ◽  
Uv Spectra ◽  
Optimum Conditions ◽  
Linear Calibration ◽  
Technical Grade

The reversed-phase high-performance liquid chromatography of some selected, industrially important aromatic sulfones has been investigated. The chromatographic behaviour of three groups of aromatic sulfones has been studied. The optimum conditions of separation and UV spectra of the sulfones and some of their hydroxy and benzyloxy derivatives are presented. The dependences of capacity factors vs methanol content in mobile phase are mentioned. The results obtained have been applied to the quantitative analysis of different technical-grade samples and isomer mixtures. For all the separation methods mentioned the concentration ranges of linear calibration curves have been determined.

scholarly journals Simultaneous Determination Of Sodium Benzoate And Sodium Cyclamate In Soft Drink Using High Performance Liquid Chromatography

2018 ◽  
Vol 3 (2) ◽  
pp. 62
Author(s):  
Ariya Wijaya Putra ◽  
Asri Darmawati ◽  
Juniar Mochtar
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
Sodium Benzoate ◽  
High Performance ◽  
Soft Drink ◽  
Correlation Coefficients ◽  
Optimum Conditions ◽  
Sodium Cyclamate

Background: Sodium benzoate and sodium cyclamate are foods additives generally used as preservative and artificial sweeteners, respectively. Monitoring of sodium benzoate and sodium cyclamate need appropriate analytical method. Objective: The main objective of this study was to gain the optimum conditions for simultaneous determination of sodium benzoate and sodium cyclamate in soft drink by High Performance Liquid Chromatography. Methods: Measurement of the additives was performed in µ-Bondapak RP18 column using methanol:phosphate buffer of pH 4 (42:58) as mobile phase with flow rate of 1 mL/minute. Results: It has shown that correlation coefficients (r) of sodium benzoate and sodium cyclamate was 0.9997 and 0.9991 respectively. Recoveries of the two analyst were acceptable. Conclusions: Five out of nine samples tested contained sodium cyclamate higher than the recommended concentration. All sodium benzoate containing samples were within the recommended concentration.

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