Liquid Chromatography (LC/HPLC)

Phytronix Technologies and Agilent Technologies have signed an agreement to promote the Phytronix laser diode thermal desorption (LDTD) ion source with Agilent mass spectrometers.

Flavanones are a type of flavonoids occurring widely in plants, either in the aglycone backbone form itself or as glycosides. Flavonones exist in unique forms depending on the type of fruit and can be used to indicate the type of fruit that is being analysed. The following application introduces examples of high-speed analysis of flavanones in citrus juice using the Shimadzu ultra fast LC system, prominence UFLC, and the photodiode array detector SPD-M20A, focusing on narirutin, naringin, neohesperidin and hesperitin.

This article describes the use of combined ion chromatography-mass spectrometry (IC–MS) and ion chromatography-inductively coupled plasma mass spectrometry (IC-ICP–MS) to analyse potentially harmful compounds.

The FDA has no objection to Rebaudioside A having a generally recognized as safe (GRAS) status as a sweetener for food and drink.1 Stevia sweeteners may contain other steviol glycosides as well, mainly Stevioside, Rebaudioside C and Dulcoside A. Because the FDA GRAS confirmation is only for the use of Rebaudioside A at 95% purity or above in food and beverages, stevia extracts must be highly purified and characterized prior to use.

Zhe Yin, Kenneth J. Fountain, Erin E. Chambers and Diane M. Diehl, Waters Corporation, Milford, Massachusetts, USA.

Based on the QuEChERS AOAC Official Method 2007.01, 16 pesticides were used for evaluating the performance of the Agilent's AOAC buffered extraction and SampliQ QuEChERS dispersive SPE kits for general fruits and vegetables.

Tobacco specific nitrosamines (TSNA) are a group of carcinogens found only in tobacco products and are formed from nicotine and related alkaloids during the production and processing of tobacco and tobacco products.

Polynuclear aromatic hydrocarbons (PAHs) are carcinogenic condensed ring aromatic compounds widely found as trace pollutants in waters, wastes, air particulates, soil and foods. PAHs can be routinely monitored using HPLC with a combination of UV and fluorescence detection as prescribed in EPA methods 550.1, 610 and 8310.

Polyaromatic hydrocarbons (PAH) are particularly relevant in the analysis of environmental pollution because of their ubiquity, toxicity and persistence. Consequently, the PAHs have become the most intensively studied pollutants in environmental analysis.

Salt formation is a critical aspect in drug development and HPLC is an important tool for determination of pharmaceutical counterions.

A method of sample preparation followed by reversed-phase high performance liquid chromatography (RP HPLC) with diode array (DA) detection.

Doug Kitson looks at some of Poland's leading separation science groups.

This is the fifth and final installment in a series of columns about various aspects of calibration of LC methods.

India is an increasingly influential player in the global pharmaceutical market. A pilot study, conducted in two major cities in India, Delhi and Chennai, explored the proliferation of substandard and counterfeit drugs in the market and discussed how the Indian state and federal governments could improve drug regulation and regulatory enforcement to combat this.

Liquid Chromatography users are asked about their experience with UHPLC

Faculty of Health Sciences at the University of Copenhagen will open the doors of its new research centre, The Novo Nordisk Foundation Centre for Protein Research. The centre is the result of an historic donation from the Novo Nordisk Foundation, which in 2007 gave the university €80 million for its establishment.

PerkinElmer and LEAP Technologies have entered into a resale agreement for ultra high performance liquid chromatography (UHPLC) and high performance liquid chromatography (HPLC) technology.

Waters Corporation (Milford, Massachusetts) announced that the U.S. Drug Enforcement Administration has purchased a Waters ACQUITY UltraPerformance liquid chromatograph for use in training new forensic chemists at the agency's Special Testing and Research Laboratory in Dulles, Virginia.

Malvern Instruments (Westborough, Massachusetts) has more than doubled the size of its web seminar program.

PerkinElmer, Inc., (Waltham, Massachusetts) has entered into a resale arrangement with LEAP Technologies Inc. (Carrboro, North Carolina).

Agilent Technologies, Inc. (Santa Clara, California) announced it has jointly developed a method to detect and identify perfluorinated compounds (PFCs) in water and soil using high-performance liquid chromatography? mass spectrometry (HPLC?MS) with the China National Environmental Monitoring Center (CNEMC).

The Pittsburgh Conference released the call for papers for Pittcon 2010, which will be held February 28 to March 5, 2010, at the Orange County Convention Center in Orlando, Florida.

Thermo Fisher Scientific (San Jose, California) announced that it has been presented with the ACHEMA 2009 Innovation Award for the category of Laboratory and Analytical Techniques.

Ron Majors provides an unbiased look at this present crisis and gives alternative solutions.

Part IV of this series focuses on three different calibration models: external standardization, internal standardization, and the method of standard additions.