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  • Application Note

    Augmenting Standard Methods of Measuring Airborne PM2.5 Using IR Imaging

    The use of IR imaging expands the measurement possibilities by giving information about the individual types of materials present in the collected particles. The information from the IR imaging experiment is not only qualitative (i.e. identification of the particulates), but can also be calibrated to give quantitative information on the components present. The IR imaging measurement will take only five minutes, whereas Ion Chromatography requires solvent extraction of the particulates and would take around 20-25 minutes per sample

  • Application Note

    Simultaneous Analysis of Nine Food Additives with the PerkinElmer Flexar FX-15 System Equipped with a PDA Detector

    This application note presents a fast and robust liquid chromatography method to simultaneously test nine widely used additives. Among the additives tested are: preservatives (benzoic acid, sorbic acid, dehydroacetic acid and methylparaben); artificial sweeteners (acesulfame potassium, saccharin and aspartame); flavoring agent (quinine); and a stimulant (caffeine).

  • 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 Note

    Rapid and Sensitive Analysis of 17 Per-and Polyfluoroalkyl Substances in Water by Direct Injection with QSight 420

    Per- and polyfluoroalkyl substances (PFAS) are a diverse group of synthetic organic compounds which have been utilized as aqueous film forming foams (AFFF) for firefighting purposes, and as stain and water resistant coatings on a number of consumer products such as clothing, furniture or cookware. PFAS compounds are highly stable from a chemical and physical standpoint, and their resistance to degradation in the environment has led to concerns over accumulating levels of PFAS in environmental habitats.

    In this application note, a versatile and efficient direct inject approach to the analysis of 17 PFAS compounds in drinking and surface water samples utilizing a PerkinElmer QSight® 420 LC/MS/MS is presented. The method offers improved sample throughput, while reducing the potential of analyte loss and contamination that can result from SPE sample preparation.

  • Application Note

    Determination of Thirteen Beta Agonists in Pork Using UHPLC - Tandem Mass Spectrometry

    Beta-adrenergic receptor agonists (ß- agonists) are synthetic drugs utilized in the treatment of conditions such as asthma in humans, and are also used as a growth-promoting agent in food-producing animals. The use of ß- agonists in food-producing livestock has been either banned or regulated across many countries owing to human health concerns.

    To aid in the monitoring and detection of ß- agonists in livestock, a highly sensitive and selective analytical method has been developed, and is presented in this study. This LC/MS/MS method details the analysis of 13 ß- agonists in pork samples, and utilizes isotopically-labeled internal standards to compensate for matrix effects present in complex food matrices.

  • Application Note

    High Speed Chromatographic Analysis of 16 Cannabinoids by HPLC-PDA

    Current trends for the analysis of the cannabinoid content in cannabis flower extracts/concentrates and commercially available fortified foods depend on liquid chromatography for potency testing and/or ensuring the label-claim accuracy in product content descriptions. This application note describes a fast and robust chromatographic method for the separation and quantitation of 16 cannabinoids commonly analyzed in cannabis-centric labs, using the PerkinElmer Flexar HPLC system with a PDA detector. To further validate the performance of this method for the industry, The Emerald Test Proficiency Test (PT) for Potency was conducted. The Emerald Test™ is an Inter-Laboratory Comparison and Proficiency Test (ILC/PT) program for cannabis testing labs. The results from the PT inter-laboratory samples passed; therefore, the method meets inter-laboratory reproducibility and accuracy.

  • Application Note

    Cannabis Analysis: Potency Testing Identification and Quantification of THC and CBD by GC/FID and GC/MS

    This application note will concentrate on the potency identification and quantification of THC and CBD in cannabis by Gas Chromatography. Other application notes will cover potency by HPLC, pesticide analysis and residual solvent analyses. Analysis of cannabis has taken on new importance in light of legalized marijuana in several states of the USA. Cannabis contains several different components classed as cannabinoids. Primary cannabinoids of interest are tetrahydrocannabinol (THC), cannabidiol (CBD) and cannabinol (CBN). Positive identification and quantification of the THC/CBD ratio is a primary objective in the analysis of cannabis. Cannabis is analyzed for several different purposes.

  • Application Note

    Determination of Coumarin in Electronic Cigarette Liquids by LC/MS/MS

    Coumarin (1,2-benzopyrone) occurs as a natural component in some plants, and is utilized as a flavoring ingredient in some foods, tobaccos and cosmetic products. In recent years, coumarin has been added to electronic cigarette liquid nicotine solutions as a flavoring component, producing a complex flavor profile with aromas of vanilla, almond, cherry and cinnamon. Coumarin has been found to exhibit hepatoxic effects, and has been banned by the FDA in food products, but this ban does not extend to tobacco products, such as electronic cigarettes.

    This application note details a method for the analysis of coumarin in electronic cigarette liquid nicotine cartridges, utilizing PerkinElmer UHPLC system coupled to a QSight® 220 triple quadrupole mass detector with a dual ionization source.

  • Specification Sheet

    Quasar SPP Particle Dimensions Specification Sheet

    Our Quasar portfolio of LC columns allows you to achieve rugged and reproducible results – batch to batch and column to column – with an all-encompassing, flexible solution that meets the diverse, changing needs of analysis.

  • Application Brief

    HPLC Analysis of Ibuprofen Using Quasar C18 Columns in Accordance with the United States Pharmacopeia

    Ibuprofen belongs to the class of compounds known as Nonsteroidal Anti-inflammatory Drugs (NSAIDS) which are used in the treatment of pain, fever and various types of inflammation. NSAIDS work by inhibiting the synthesis of a wide range of prostaglandins produced as a response to injury, strain or illness. Since its introduction in 1969, its tolerability and effectiveness have made it one of the most popularly prescribed/taken medications in the world, with over 24 million prescriptions in the U.S. alone. Ibuprofen has generic status with many manufacturers, making it a very commercially important compound. Projections have estimated a global market value of ibuprofen to be 294.4 million USD in 2020, with an estimated value of 447.6 million USD by 2026. This application brief describes the use of a Quasar C18, on both porous silica and SPP silica phases for the analysis of ibuprofen in accordance with the official USP monograph, specifically, the chromatographic purity section.

  • Application Note

    Analysis of Pesticide Residues in Cannabis Regulated by Oregon State Using LC/MS/MS

    Liquid chromatography-tandem mass spectrometry (LC/MS/MS) has become the method of choice for pesticide. The state of Oregon has issued regulatory limits for 59 pesticide residues in both cannabis flower and concentrates, while other states have come up with their own lists of pesticide residues relating to medical marijuana and cannabis testing.

  • Application Note

    Analysis of Volatile Organic Compounds (VOCs) in Air Using US EPA Method TO-17

    Optimized methods are needed for the analysis of toxic compounds in air to understand the impact to human health. People breathe approximately 20,000 liters of air a day so this concern is significant. EPA Method TO-17 is used to determine toxic compounds in air after they have been collected onto sorbent tubes. This application note demonstrates that the PerkinElmer TurboMatrix™ Thermal Desorber and the PerkinElmer Clarus® SQ 8 GC/MS will meet and exceed the criteria set forth in EPA method TO-17. Detailed instrument method parameters are presented, with precision, recovery, linearity and detection limit results.

  • Poster

    Quasar Liquid Chromatography Columns Postcard

    SPECIAL OFFER: 35% off discount on all Quasar LC Columns Until August 28, 2020 To take advantage of this offer, visit our website and use promotion code: QUASAR35 at checkout.

  • Application Note

    Analysis of Benzo[a]pyrene in Tobacco and Related Products

    Benzo[a]pyrene (B[a]P) is a well-known carcinogenic compound found in tobacco products and tobacco smoke. The Cooperation Centre for Scientific Research Relative to Tobacco (CORESTA) has recommended a gas chromatography/ mass spectrometry (GC/MS) method to determine concentrations of B[a]P in tobacco products. In the proposed method, B[a]P is extracted from the tobacco with methanol, followed by a solid phase extraction (SPE) and subsequent concentration prior to GC/MS analysis. The CORESTA recommended method is time-consuming, especially in sample preparation procedures, and showed low sensitivity. In this application note, a simple, reliable and fast analytical method for the determination and quantification of B[a]P in tobacco products has been developed using a PerkinElmer QSight® LX50 UHPLC system, coupled to a PerkinElmer QSight 220 MS/MS detector.

  • 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 Note

    Direct Analysis of 17 Perfluorinated Compounds in Water at Low Parts-Per-Trillion Levels by LC/MS/MS Workflow

    Perfluorinated compounds (PFCs) have received lots of attention recently due to their resistance to degradation in the environment. Reports of their occurrence in tap water, food or even human blood have led to concerns of their impact on the human body as pollutants. To better understand their effect on the environment it is critical to analyze PFASs in biological and environmental matrices.

  • 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

    Determination of the Nitrofuran Metabolites in Seafood using Ultra High-Performance Liquid Chromatography - Tandem Mass Spectrometry

    Nitrofurans are a class of broad-spectrum antibiotics that are widely used to kill or slow down the growth of bacteria in the aquaculture industry. The use of nitrofurans and their metabolites has been restricted by a number of countries and organizations within the European Union, United States and China, due to their harmful side effects to human health, and a Minimum Required Performance Limit (MRPL) 0f 1.0 µg/kg has been set for food, animal and aquaculture products.

    LC/MS/MS methods have been used for the detection of nitrofuran metabolites in many studies owing to the high sensitivity, selectivity and specificity of the methods. However, nitrofuran metabolites demonstrate low ionization efficiency with the electrospray ion source used in LC/MS/MS systems. Therefore, the use of a derivatization step for nitrofuran metabolites before extraction and LC/MS/MS analysis is crucial to meet the low regulatory limits of 1.0 µg/kg in food samples. The main purpose of this work is to determine the detection limits for nitrofurans using QSight® 210 LC/MS/MS system.

  • 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 Note

    Method Validation for Atrazine Analysis in Fresh, Atypical Mineral and Carbonated Waters

    EU water policies are reevaluated on a consistent basis to ensure water sources do not contain contaminants at levels above regulatory levels. As regulations are reviewed, regulatory limits are often lowered, and analytical techniques must adapt to meet the new stringent requirements.

    In this application note, an LC/MS/MS method for the determination of 214 regulated contaminants is presented. The direct injection method, utilizing a PerkinElmer® QSight 420, is optimized with the use of dual ionization sources (APCI and ESI). Additionally, an inter-laboratory study is detailed to illustrate the method transferability between instruments, utilizing the compound Atrazine.

  • Application Note

    Determination of Mycotoxins in Cereals by LC/MS/MS with Online SPE

    Mycotoxins are toxic secondary metabolites produced by fungi, and are capable of causing disease and death in both humans and animals. Sample preparation is a critical step in the successful analysis of mycotoxins in food matrices. The "dilute and shoot" approach is a quick and easy way to introduce the sample into the LC/MS/MS analysis. However, due to the complexity of food matrices, this approach will often result in irreproducible matrix effects. To overcome these problems and improve sensitivity, this application note details the use of online solid phase extraction (SPE), coupled to an LC/MS/MS system for sample enrichment.

  • Application Brief

    HPLC Analysis of the Semi-Synthetic Antibiotic Azithromycin Using a Quasar C18 Column

    Azithromycin, discovered in 1980, is a semi-synthetic macrolide antibiotic derived from erythromycin. The drug is primarily used to treat various bacterial infections including respiratory infections, acute bacterial sinusitis, skin infections, Lyme disease, and some sexually transmitted infections. The mode of action of azithromycin is by inhibiting bacterial protein synthesis through binding to the 50S subunit of the bacterial ribosome, thereby inhibiting translation of mRNA. The USP monograph for the analysis of azithromycin states the use of a high pH mobile phase (pH 11), which requires a specific and expensive column. The method also uses amperometric electrochemical detection, which is often unavailable in many laboratories. HPLC with a UV or PDA detector provides a good alternative as it is available in most laboratories. This application brief describes the use of a Quasar C18 column in the analysis of azithromycin.

  • Application Note

    Efficient LC/MS/MS Method for Testing Hemp Samples for Pesticide Residues

    Agricultural growing of hemp products for the purposes of cannabidiol (CBD) extraction was legalized in the United States with the passing of the Agricultural Improvement Act of 2018. Since the act passed, heightened concern over the use of pesticides in hemp production has been appreciated. However, no federal guidance is currently available in the United States to standardize analytical methods for the detection and quantification of pesticide residues in hemp products.

    In this application note, a robust and efficient single-run LC/MS/MS method for the determination of 66 pesticides, including hydrophobic and chlorinated pesticides typically analyzed by GC/MS/MS, is presented. Utilizing a PerkinElmer QSight® 420 UHPLC with MS/MS detector and dual ESI and APCI sources, excellent recoveries in the range of 70-120% were achieved. The application note also outlines participation in an Emerald Scientific blind proficiency test, with acceptable results for all 66 pesticides.

  • Application Brief

    HPLC Analysis of Lopinavir and Ritonavir Using a Quasar C8 Column Application Brief

    Lopinavir and ritonavir are commonly prescribed as a fixed-dose combination drug therapy for the treatment of Human Immunodeficiency Viruses (HIV) and belong to a class of antiviral drugs known as protease inhibitors. Lopinavir by itself has insufficient bioavailability to be an effective therapy. However, ritonavir inhibits cytochrome P450 enzymes in the liver known to break down lopinavir, increasing its concentration in the blood to its desired therapeutic window. Lopinavir and ritonavir treatment as a single medication is listed by the World Health Organization’s (WHO) list of essential medicines, which serves as a model of the safest and most effective medicines required by a health system. Early studies have shown promising results as a treatment against SARS-CoV-2 and further research is currently being conducted into its efficacy. This application brief describes the use of a Quasar C8 column for the analysis of lopinavir and ritonavir.

  • Application Brief

    Robust Atorvastatin Analysis Under High Aqueous LC Conditions Application Brief

    The origin of statins dates back to the mid 1970’s when the Japanese biochemist, Akira Endo, isolated a factor from the fungus Penicillium citrinum which he identified as a competitive inhibitor of 3-hydroxy-3-methylglutarylcoenzyme A reductase (HMG-CoA reductase). This substance, which he named compactin or mevastatin, was the first statin to be administered to humans. Statins competitively inhibit HMG-CoA reductase, an enzyme involved in cholesterol synthesis, especially in the liver. Used to prevent cardiovascular disease and to lower cholesterol levels, atorvastatin is one of a number of synthetic statins routinely produced. It is now the most commonly prescribed statin medication. This application brief describes the robust HPLC analysis of the polar compound atorvastatin using a gradient which reaches 100% aqueous mobile phase conditions.

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