A simple method for the analysis of extracellular vesicles enriched for exosomes from human serum by capillary electrophoresis with ultraviolet diode array detection

2021 ◽  
Vol 1635 ◽  
pp. 461752
Author(s):  
Oumaima El Ouahabi ◽  
Hiba Salim ◽  
Roger Pero-Gascon ◽  
Fernando Benavente
Keyword(s):  
Capillary Electrophoresis ◽  
Human Serum ◽  
Extracellular Vesicles ◽  
Diode Array ◽  
Diode Array Detection ◽  
Simple Method ◽  
Array Detection

Determination of Sterigmatocystin in Infant Cereals from Hangzhou, China

2016 ◽  
Vol 99 (5) ◽  
pp. 1273-1278 ◽  
Author(s):  
Shaoying Liu ◽  
Jicai Fan ◽  
Xihui Huang ◽  
Quan Jin ◽  
Guonian Zhu
Keyword(s):  
Electrospray Ionization ◽  
Analytical Method ◽  
Diode Array ◽  
Tandem Ms ◽  
Diode Array Detection ◽  
Simple Method ◽  
Esi Ms ◽  
Array Detection ◽  
Ionization Mode

Abstract A simple method was developed for the determination of sterigmatocystin in infant cereals. The method consists of a quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction approach and cleanup with an SPE HLB cartridge. After purification for separation and quantification of sterigmatocystin, HPLC with UV detection and diode-array detection (DAD) was used at sterigmatocystin levels >10 μg/kg, whereas ultra-performance LC with electrospray ionization (ESI) and tandem MS (MS/MS) was used at levels <10 μg/kg. The compound was determined by UV-DAD at 325 nm and by ESI-MS/MS in the positive ionization mode. Good r2 values (≥0.99) were found with both UV-DAD and ESI-MS/MS, and satisfactory recoveries (84.8–96.2%) of sterigmatocystin in infant cereals were demonstrated, with RSD values ≤11.43%. The developed analytical method was used for the determination of sterigmatocystin in infant cereals from Hangzhou, China.

A Simple Method for the Determination of Carbaryl and 1-Naphthol in Fruit Juices by High-Performance Liquid Chromatography–Diode-Array Detection

2003 ◽  
Vol 66 (8) ◽  
pp. 1510-1513 ◽  
Author(s):  
GÜL ÖZHAN ◽  
SIBEL TOPUZ ◽  
BUKET ALPERTUNGA
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Fruit Juice ◽  
Degradation Products ◽  
Diode Array ◽  
Diode Array Detection ◽  
Simple Method ◽  
Array Detection

Carbaryl (Sevin) is a widely used N-methylcarbamate insecticide. In this study, a simple and sensitive reversed-phase, high-performance liquid chromatography method with diode-array detection has been developed for the determination of low levels of carbaryl and its degradation products 1-naphthol in several kinds of canned pure fruit juice. The compounds were captured on a C18 cartridge. The analytes were separated on a C18 column using a linear gradient of 40 to 60% acetonitrile in water in a period of 20 min. The extraction recoveries of carbaryl and 1-naphthol were in the range 93.5 to 98.0% and 90.7 to 96.0% for fruit juice, respectively. The detection limit was below 0.8 ng/ml and the calibration curves showed good linearity between 0.9998 and 0.9999.

Simultaneous determination of dithiocarbamates by capillary electrophoresis with diode array detection and using factor analysis

1997 ◽  
Vol 339 (1-2) ◽  
pp. 123-129 ◽  
Author(s):  
Albert W.M. Lee ◽  
W.F. Chan ◽  
Fion S.Y. Yuen ◽  
C.H. Lo ◽  
Raymond C.K. Chan ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Capillary Electrophoresis ◽  
Simultaneous Determination ◽  
Diode Array ◽  
Diode Array Detection ◽  
Array Detection
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