TurboFlow在线净化是一种结合涡流扩散、体积排阻及化学作用原理的在线样品纯化技术,具有自动化程度高、操作步骤少、实验误差小以及试剂使用量小等优点,与液相色谱-串联质谱(Liquid Chromatography-Tandem Mass Spectrometry,LC-MS/MS...TurboFlow在线净化是一种结合涡流扩散、体积排阻及化学作用原理的在线样品纯化技术,具有自动化程度高、操作步骤少、实验误差小以及试剂使用量小等优点,与液相色谱-串联质谱(Liquid Chromatography-Tandem Mass Spectrometry,LC-MS/MS)联合使用,不仅能简化样品前处理步骤,还能实现对目标化合物的高灵敏度、高准确度和高通量的检测,被广泛应用于食品安全检验领域。本文介绍TurboFlow在线净化-液相色谱-串联质谱(TurboFlow Online Cleanup-Liquid Chromatography-Tandem Mass Spectrometry,TF-LC-MS/MS)技术的原理和优势,讨论该技术在食品安全检测中的应用,旨在进一步提高食品安全检验能力,助力食品安全监管。展开更多
Introduction: Conventional metabolite analyses often require manual sample preparation, generating variability of measurements. This study describes a new method to quantify radiometabolites in blood, combining ultra ...Introduction: Conventional metabolite analyses often require manual sample preparation, generating variability of measurements. This study describes a new method to quantify radiometabolites in blood, combining ultra high performance liquid chromatography (UHPLC) and turbulent flow chromatography, an alternative fully automated process allowing analyte’s extraction. Methods: A new radiotracer for dopamine transporter imaging, namely LBT-999, was used to demonstrate the method’s robustness. Matrix effect, Turboflow column loading, linearity, specificity and precision were evaluated with in vitro samples of LBT-999 in human plasma. Radiodetector sensitivity and preliminary evaluation were respectively determined by analysis of calibrated samples of [18F]LBT-999 and blood samples from 4 healthy subjects injected with [18F]LBT-999, withdrawn at 5, 15, 30 and 45 min pi. Results: With three sequential loadings (3 × 100 μL) of the Turboflow column, mean coefficients of variation were 1%, below 2%, 2% and 30.9% for matrix effect, specificity, repeatability and intermediate precision, respectively. Correlation coefficients for linearity were superior to 0.97. Limits of detection and quantification of the radiodetector were fixed at 3 and 9 c/s. Retention times for [18F]LBT-999 and the two radiometabolites detected by radio-UHPLC were 6.5, 4.8 and 9.6 min. Forty-five min after the injection, parent fraction was still predominant with 57.8% ± 25% of the total radioactivity. Conclusions: An innovative approach, allying UHPLC and Turboflow column, was developed and its sensitivity, linearity, specificity and repeatability validated. Preliminary results of the clinical trial are in accordance with literature data, demonstrating its efficiency in radiometabolites quantification.展开更多
文摘TurboFlow在线净化是一种结合涡流扩散、体积排阻及化学作用原理的在线样品纯化技术,具有自动化程度高、操作步骤少、实验误差小以及试剂使用量小等优点,与液相色谱-串联质谱(Liquid Chromatography-Tandem Mass Spectrometry,LC-MS/MS)联合使用,不仅能简化样品前处理步骤,还能实现对目标化合物的高灵敏度、高准确度和高通量的检测,被广泛应用于食品安全检验领域。本文介绍TurboFlow在线净化-液相色谱-串联质谱(TurboFlow Online Cleanup-Liquid Chromatography-Tandem Mass Spectrometry,TF-LC-MS/MS)技术的原理和优势,讨论该技术在食品安全检测中的应用,旨在进一步提高食品安全检验能力,助力食品安全监管。
文摘Introduction: Conventional metabolite analyses often require manual sample preparation, generating variability of measurements. This study describes a new method to quantify radiometabolites in blood, combining ultra high performance liquid chromatography (UHPLC) and turbulent flow chromatography, an alternative fully automated process allowing analyte’s extraction. Methods: A new radiotracer for dopamine transporter imaging, namely LBT-999, was used to demonstrate the method’s robustness. Matrix effect, Turboflow column loading, linearity, specificity and precision were evaluated with in vitro samples of LBT-999 in human plasma. Radiodetector sensitivity and preliminary evaluation were respectively determined by analysis of calibrated samples of [18F]LBT-999 and blood samples from 4 healthy subjects injected with [18F]LBT-999, withdrawn at 5, 15, 30 and 45 min pi. Results: With three sequential loadings (3 × 100 μL) of the Turboflow column, mean coefficients of variation were 1%, below 2%, 2% and 30.9% for matrix effect, specificity, repeatability and intermediate precision, respectively. Correlation coefficients for linearity were superior to 0.97. Limits of detection and quantification of the radiodetector were fixed at 3 and 9 c/s. Retention times for [18F]LBT-999 and the two radiometabolites detected by radio-UHPLC were 6.5, 4.8 and 9.6 min. Forty-five min after the injection, parent fraction was still predominant with 57.8% ± 25% of the total radioactivity. Conclusions: An innovative approach, allying UHPLC and Turboflow column, was developed and its sensitivity, linearity, specificity and repeatability validated. Preliminary results of the clinical trial are in accordance with literature data, demonstrating its efficiency in radiometabolites quantification.
