A Vanquish Flex Quaternary UHPLC system was applied for the SEC analysis. This is a low dispersion, inert UHPLC, which can be used successfully for this type of application. For this analysis, pre-column dispersion was intentionally introduced to show the effects of dispersion in front of the column at different flow rates.
德国枸杞(欧楂)果实的植物化学和抗氧化特性Phytochemical and antioxidant characteristics of medlar fruits (Mespilus germanica L.)土耳其阿塔图尔克大学农学院园艺系土耳其阿塔图尔克大学农学院食品科学系土耳其古穆沙内大学工学院食品科学系克罗地亚萨格勒布大学农学院基于凯氏法使用格哈特Gerhardt公司维普得Vapodest10快速凯氏蒸馏系统测定德国枸杞(欧楂)的总氮The Kjeldahl method and a Vapodest 10 Rapid Kjeldahl Distillation Unit (Gerhardt, Königswinter, Germany) were used to determine total N.土耳其库鲁谷11个德国枸杞(欧楂)品种中蛋白质,3.3-4.3%
全自动固相萃取净化猪肉中的磺胺,得出的回收率处于70-102%之间,证明FotectorPlus 固相萃取系统对实验结果影响很小。乙酸乙酯提取液需过一下无水硫酸钠转移到鸡心瓶中或者是Reeko 上样瓶中,因为转移乙酸乙酯层时会有基底残渣,在正己烷除脂时容易形成胶状层,使得水相与正己烷相难以分层。Fotector Plus 能够自动的完成整个固相萃取流程,从活化到上样,清洗样品瓶,洗脱。Fotector Plus 将固相萃取的每个流程自动化,减小了人工操作带来的误差,获得了手动固相萃取无法达到的RSD 水平。
A forensic method for analysis of opiates, opioids, andtheir metabolites without hydrolysis has been developedusing the Prelude SPLC system and TSQ Endura MS. Byeliminating the hydrolysis step, the sample preparationtime and analysis cost was drastically reduced. The LCmethod on the Prelude SPLC system/TSQ Endura MS provided ample resolution for all isobaric compounds andan outstanding increase in overall speed of analysis. The high sensitivity that the TSQ Endura MS provided allowed for low limits of quantitation of even the least responsive analytes, like the gluronidated metabolites. The fast SRMacquisition rate yielded a successful, simultaneous analysisof 19 compounds with 10 internal standards.
This application note describes the development and valuation of a comprehensive LC/MS/MS method for over 500 pesticide analyses in three food matrices (wheat, olive oil, and black tea). The work was completed using the Agilent 6475 triple quadrupole LC/MS (LC/TQ) system coupled with the Agilent 1290 Infinity II Bio LC system and MassHunter Workstation 12.0.
从铝土矿渣(红泥)中回收稀土Recovery of Rare Earths from Bauxite Residue (Red Mud)使用格哈特Labshake振荡器160rpm条件下振荡样品The room temperature leaching was carried out in sealed polyethylene bottles by constant agitation using a laboratory shaker (Gerhardt Laboshake) at 160 rpm