Chromatography

Tags: beijing normal university bold colors chromatography copper phthalocyanine forensic forensic analysis forensic application forensic science fountain pens gel pens HPLC ink analysis iron oxides

Here is another example of forensic application of HPLC that allows to classify and date the black gel pen ink entries on documents. Gel pens first came out in 1984 in Japan and quickly became popular throughout the world due to their solid line, bold colors, and low cost. They are also regarded as environmentally [...]

Tags: CZE furosine g protein HPLC hplc method isoflavones linear gradient lysine residues Mass Spectrometry Nano HPLC potassium chloride powdered soy milk protein protein degradation solid-phase extraction solvent usage

The HPLC method used a C8 column and the potassium chloride in aqueous acetic acid as a mobile phase with a linear gradient. The retention time was a bit over 20 min and the identity of the peak was confirmed as furosine by MS (mass spectrometry).

Tags: amino acids and peptides amino groups artificial flavoring carbonyl groups CZE digestability dry soybeans electrophoresis food chemists furosine han dynasty heart disease risk HPLC isoflavones lysine maillard protein soy soybean curd soybeans

During the heating process carbonyl groups of sugars react with amino groups of amino acids and peptides forming a variety of products. The products of this, so-called, Maillard reaction contribute to flavor, aroma, and color of soy milk.

Tags: agilent chemistry community chromatography chromatography today conventional counterpart diameter reduction electrospray HPLC inner diameter lab-on-a-chip liquid chromatography microfluidic Nano HPLC nanostream nanotechnology peak width separation efficiency solvent consumption yahoo answers

Nano HPLC is a relatively new development in chromatography world driven by recent advancements in proteomics that would require decreasing of inner diameter (ID) of liquid chromatography (LC) column to allow for a smaller sample amount and to increase sensitivity.

Tags: acetone water aromatic system chemical compounds HPLC isoprene mangosteen ripe fruits solvent mixture south east asia tropical fruits weber state university xanthones

Scientist at Weber State University developed methods for extraction, identification and quantitation of xanthones and their derivatives: alpha-mangostin, 8-desoxygartanin, gartanin, beta-mangostin, 3-mangostin, and 9-hydroxycalabaxanthone.

Tags: amazon link benefits of resveratrol dr hoffman high performance liquid chromatography high performance liquid chromatography hplc HPLC LCMS liquid chromatography mass spectrometry natural antioxidant News parkinson performance liquid chromatography resveratrol richard hoffman university of hertfordshire uk wine

Scientists from University of Hertfordshire (UK) are using new chemistry laboratories to analyze a random selection of red wines to determine the levels of resveratrol which is a natural antioxidant found in red wine and red grape skins

Tags: agilent flow rates HPLC hplc instruments ml News particle sizes rapid resolution robustness table id throughput universal

Another great LC system by Agilent provides up to 20 times faster analysis and 60 % higher resolution than conventional HPLC without sacrificing resolution, precision or sensitivity and while keeping system pressure at a minimum.