Citation: LI Lan, LIU Jun, WANG Feng. Determination of 20 Forbidden Industrial Dyes in Capsule Shells by High Performance Liquid Chromatography with Diode Array Detection[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(7): 1112-1118. doi: 10.11895/j.issn.0253-3820.151022 shu

Determination of 20 Forbidden Industrial Dyes in Capsule Shells by High Performance Liquid Chromatography with Diode Array Detection

LI Lan ^1, ,
LIU Jun ² ,
WANG Feng ¹

1.
Key Laboratory of Oil & Gas Fine Chemicals Ministry of Education, Xinjiang University, Urumqi 830046, China;
2.
Technology of Center of Xinjiang Entry-exit Inspection and Quarantine Bureau, Urumqi 830063, China

Received Date: 29 December 2015
Revised Date: 10 March 2016

Figures(2)

A high performance liquid chromatography with diode array detection method (HPLC-DAD) was established for determination of 20 forbidden industrial dyes in capsule shells. The capsule shell samples were repeatedly extracted three times under ultrasonication with acetonitrile-methanol solution (1:2, V/V). The extract was separated on Agilent ZORBAX Eclipse Plus C18 column with gradient elution by using acetonitrile and 0.3% triethylamine, 0.2% phosphoric acid aqueous solution (pH 2.7) as eluant, and then monitored under the detection wavelength of 360, 420, 460, 570 and 630 nm. The results showed that the linearity of 20 forbidden industrial dyes ranged from 0.5 to 20 μg/ml with correlation coefficients of 0.9991-1.0000. The limit of detection of the instrument was 0.05 to 0.27 μg/mL. The recoveries of these dyes (spiked at levels of 1, 3, and 10 μg/g) ranged from 64.12% to 114.89%, while intra-day and inter-day relative standard deviations ranged from 0.4% to 9.9% and 0.9% to 9.9%, respectively. The Limit of quantification of the method was 0.16-2.33 μg/g. This method is sample, rapid and sensitive, and suitable for routine determination of the forbidden industrial dyes in capsule shells.
- Industrial dyes,
- Capsule shell,
- High performance liquid chromatography,
- Diode array detection
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