scholarly journals Determination of dyes and marker in diesel using high performance liquid chromatography

Chemija ◽  
2018 ◽  
Vol 29 (2) ◽  
Author(s):  
Audrius Markevičius ◽  
Audrius Zolumskis ◽  
Audrius Sadaunykas ◽  
Birutė Knašienė ◽  
Adrian Vicent Claramunt ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Mobile Phase ◽  
High Performance ◽  
Direct Injection ◽  
Chromatography Method ◽  
Visible Wavelength Range ◽  
Liquid Chromatography Method ◽  
Elution Gradient

A fast, precise and accurate high performance liquid chromatography method has been developed for the determination of dyes (Solvent Red 19 and Solvent Blue 35) and a marker (Solvent Yellow 124) in diesel. Separation was carried out on a 250 × 4.60 mm Agilent Zorbax Rx-SIL column (5 µm particle size). Detection was done in a visible wavelength range. The best performance of fuel dye separation and the shortest retention times were achieved when using hexane, toluene and ethyl acetate as a mobile phase. During this research the eluent composition and the elution gradient were optimized consequently that helped to perform the analysis within 15 min. The developed method was applied for the analysis of real samples of dyed diesel fuel. Preparation of the samples for the analysis simply consisted of filtering through a 0.45 µm filter previous to direct injection of the sample into the HPLC system for analysis.

Determination of Chloramphenicol Residual in Freshwater Fish by HPLC

2013 ◽  
Vol 781-784 ◽  
pp. 1708-1711 ◽  
Author(s):  
Yi Qing Yang ◽  
Qian Wang ◽  
Qiao Wang ◽  
Shi Jie Yan
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Freshwater Fish ◽  
Mobile Phase ◽  
High Performance ◽  
Limit Of Detection ◽  
Chromatography Method ◽  
Average Recovery ◽  
Liquid Chromatography Method

HPLC (High Performance Liquid Chromatography) method for chloramphenicol residues in freshwater fish was developed. The samples were extracted with ethyl acetate. The LC was performed on a C18 column, mobile phase consisted of methanol-water (45:55 v/v) and eluted at 0.2mL/min at 20°C, inject volume was 20μl. The linear rang for chloramphenicol residual is within 0.5-20μg/mL, the limit of detection is 0.01ng/g. The average recovery is 80.06%-92.71%, and the RSD is 1.46%-5.61%. This method is employed to analyze freshwater fishes, such as catfish, chub and carp.

Reversed-phase high performance liquid chromatography method for the determination of paraquat in whole blood

2014 ◽  
Vol 6 (16) ◽  
pp. 6560-6564 ◽  
Author(s):  
Wuxiang Zhang ◽  
Yicong Su ◽  
Jiangu Shi ◽  
Maosheng Zhang ◽  
Bide Wu ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Whole Blood ◽  
High Performance ◽  
Reversed Phase ◽  
Chromatography Method ◽  
Liquid Chromatography Method

In this paper, a high performance liquid chromatography technique is established for quantification of paraquat in blood.

Determination of adenine nucleotides by the modified method of high-performance liquid chromatography

2021 ◽  
Vol 66 (3) ◽  
pp. 172-176
Author(s):  
Lyubov Borisovna Kalikova ◽  
E. R. Boyko
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Mobile Phase ◽  
High Performance ◽  
Adenine Nucleotides ◽  
Release Time ◽  
Chromatography Method ◽  
Rp Hplc ◽  
Standard Solutions

Adenine nucleotides (ATP, ADP and AMP) play a central role in the regulation of metabolism and energy: they provide the energy balance of the cell, determine its redox state, act as allosteric effectors of a number of enzymes, modulate signaling and transcription factors and activate oxidation or biosynthesis substrates. A large number of methods have been developed to determine the level of ATP, ADP and AMP, but the most universal and effective method for the separation and analysis of complex mixtures is the reversed-phase high-performance liquid chromatography method (RP-HPLC). The aim of this study is to determine the optimal conditions for the qualitative separation and quantitative determination of standard solutions of ATP (1 mmol/l), ADP (0,5 mmol/l) and AMP (0,1 mmol/l) by RP-HPLC. The degree of separation of adenine nucleotides was estimated by the time of peak output in the chromatogram. To achieve the goal, the following tasks were set: assess the effect of the temperature of the analysis on the separation and change of the release time of the analytes in the chromatogram; determine the most optimal composition of the mobile phase for the separation of ATP, ADP and AMP in the chromatogram (the content of the organic solvent in the solution); to identify the effect of pH of the mobile phase on the separation of standard solutions of adenine nucleotides; set the optimal molarity of the mobile phase for the separation of ATP, ADP and AMP in the chromatogram. It was found that the temperature of the analysis does not affect the quality of peak separation, while the composition and pH of the mobile phase have a significant effect on the complete and clear separation of the studied nucleotides in the chromatogram. It was determined that the analysis temperature of 37°C and the mobile phase of 0.05 M KH2PO4 (pH 6.0) are optimal for separating the peaks of adenine nucleotides.

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