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  • Application Note

    High Sensitivity Methotrexate Quantitation in Human Serum Utilizing

    This application note outlines a rapid LC-MS/MS research method utilizing the QSight® 220 triple quadrupole mass spectrometer. The developed method provides exceptional results for the quantitation of methotrexate in serum especially in terms of LLOQs and linearity.

  • Application Note

    Rapid, High Throughput Analysis of Compounds in Urine

    Urine is the matrix of choice as it can be collected easily and in large volumes. The variations within the urine matrix can adversely impact chromatographic separation and LC-MS/MS signal. The present study demonstrates that a simple “dilute and shoot” method coupled with the high sensitivity QSight® 220 triple quadrupole mass spectrometer system eliminates many of the complexities of sample preparation without compromising quantitation quality.

  • Application Note

    Metanephrine and Normetanephrine Quantification by SPE-LC-MS/MS

    Measurement of metanephrines and normetanephrine in plasma is challenging due to the low physiological concentrations, their hydrophilic nature1, and time consuming traditional sample preparation. With use of the PerkinElmer QSight® 220 triple quadrupole mass spectrometer, LC-MS/MS analysis was performed using the recently advanced solid phase extraction (SPE) sorbent technology (“load, wash, elute”) method protocol. As a result low levels of ME and NOR are detectable in plasma with short sample preparation and LC run time. This LC-MS/MS method provides a fast, sensitive, accurate, and reproducible solution for the analysis of ME and NOR in plasma.

  • Application Brief

    Warfarin Analysis Using a Quasar AQ UHPLC Column

    Today, Warfarin is the most widely used anticoagulant in the world, used to thin the blood and prevent clots.1 It was discovered by chance when in the 1920’s cattle in the US were found to be bleeding to death having eaten mouldy hay from sweet clover crops.2 However, the exact identity of the substance causing the haemorrhaging was to remain unknown for many years. Over the coming years studies of the spoiled hay eventually led to the extraction of a compound which was later named dicoumarol. It was observed that this dicoumarol could not act as an anticoagulant on its own. It was only after it was metabolised byfungi that it exhibited anticoagulant properties. This explained why only spoiled hay caused the outbreak in the cattle. After further research, the synthesis of a more potent anticoagulant from dicoumarol, warfarin, was produced. Warfarin first commercial use was as a rat poison in 1948, followed by license for human use in 1953. This application brief illustrates the analysis of warfarin, Figure 1, using the Quasar AQ liquid chromatography phase.

  • Application Brief

    Analysis of Naproxen using Quasar SPP C18 Column

    Naproxen is a nonsteroidal anti-inflammatory drugs (NSAIDs) used to treat certain types of arthritis and other acute inflammatory conditions. It was first released to the prescription drug market in 1976 under the name Naprosyn. Then a few years later its counterpart salt, naproxen sodium, was released for prescription use and is used predominately in formulations today. The HPLC analysis of Naproxen on a porous silica C18 column is well documented in the literature. However, with the current trend in liquid chromatography being towards higher kinetic efficiency and shorter analysis time the subsequent development in column technology has realised that, without the need to change instrumentation. This application brief will illustrate the application of a superficially porous particles (SPP) column for the analysis of naproxen.

  • White Paper

    Advantages and Applications of Superficially Porous Particle Columns in Liquid Chromatography

    The current trend in liquid chromatography is towards the achievement of higher kinetic efficiency and shorter analysis time. Different types of column packings are now available for attaining very fast and high resolution separations without changing instruments, worrying about high backpressure or compromising column longevity. In recent developments of particle technology, the use of superficially porous particles has received considerable attention. This white paper gives an overview about the theory behind the success of superficially porous particles technology and presents a summary of its latest applications.

  • Application Brief

    HPLC Analysis of Vitamin C Using Quasar Biphenyl Column

    Vitamin C, also known as ascorbic acid and L-ascorbic acid, is a water soluble vitamin found in various foods including peppers, kiwifruit, oranges and kale. It is regarded as an essential nutrient to prevent scurvy, involved in the repair of tissue and also thought to lower cancer risk. It is required for the functioning of several enzymes and is important for immune system function. Since it’s isolation in 1928 it was the first vitamin to be commercially produced. Today it is widely available as a dietary supplement. This application brief describes use of a Quasar biphenyl column in the analysis of vitamin C.

  • Flyer

    Quasar Liquid Chromatography Columns Flyer

    Our wide range of column sizes has its benefits, including:• Longevity to withstand highthroughput environments• High-efficiency separations to facilitate trace-level analysis• Good resolution and peak shapes for more effective compound separation• Analysis of increasing polar and complex analytes.

  • Application Brief

    HPLC Analysis of Tramadol Using SPP Column Technology

    Opiates, originally derived from the opium poppy, have been used for thousands of years for both recreational and medicinal purposes.

  • Application Note

    Analysis of Aflatoxins by UHPLC

    Aflatoxin B1 is considered to be the most genotoxic of the mycotoxins, and, when ingested by cows, is converted to aflatoxin M1 which has been shown to cause liver cancer in certain animals.

  • Application Brief

    Analysis of Water-Soluble Vitamins (B2, B3) using Quasar SPP HILIC Column

    In 1906, English biochemist Sir Frederick Gowland Hopkins also discovered that certain food factors were important to health. All the vitamins we recognise today were discovered during the early 20th century. There are two groups of vitamins, fat soluble and water soluble. Both types are regarded as essential for normal growth and our overall well being. Vitamin B2 (Riboflavin) and vitamin B3 (Niacinamide) are water soluble vitamins, naturally occurring in a number of food stuffs including milk and eggs. Both vitamins are used as dietary supplements and can help lower cholesterol, prevent migraines. Hydrophilic interaction liquid chromatography (HILIC), as first suggested by Alpert in 1990 provides an alternative approach to effectively separate small polar compounds, on polar stationary phases, which are not well retained under reversed phase conditions. Water is the strongest solvent in HILIC and as mobile phases typically contain low levels of water the resulting methods are ideally suited for MS applications. This application brief illustrates the efficient separation of vitamin B2 and B3 applying the HILIC mode of separation using the Quasar SPP HILIC column.

  • Application Note

    Cannabinoid Monitoring in Dried Cannabis Flowers

    This application describes an analytical method for the chromatographic separation and quantitative monitoring of seven primary cannabinoids, including THC and THC-A, in cannabis extracts by HPLC with PDA detection. Naturally occurring cannabinoids, the main biologically active component of the cannabis plant, form a complex group of closely related compounds, of which 113 are known and 70 are well described. Of these, the primary focus has been on ?9-tetrahydrocannabinol (THC), as the primary active ingredient due to its pharmacological and toxicological characteristics, upon which strict legal limits have been enforced.

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