Flexar UHPLC

Over time, exposure to ultra violet (UV) ,radiation from the sun or tanning beds can ,damage the skin’s cellular DNA, resulting in ,mutations that cause 3.5 million cases of skin ,cancers and about 11,500 deaths in the U.S. ,each year, for a total cost of nearly $2 billion. ,There are three types of UV: UVC, UVB, and ,UVA.

Biocides are chemical substances that are used to kill or inhibit harmful organisms. Biocides have a wide range of applications in consumer and industrial products.

This application will focus on the solid phase extraction (SPE) and HPLC analysis of chlorophenols in three tap water samples.

Dyes are used to intensify the color of food products and make them look tempting. They are also used to minimize color variation, and to prolong color stability on shelf. This application note presents a fast and robust HPLC method for the determination of dyes in beverages. Method conditions and performance data including precision and linearity are presented. A popular orange soda is analyzed and the type and amount of dyes used are confirmed.

This note describes a number of important food applications utilising the PerkinElmer DSC demonstrating the versatility of the technique as a tool in the food industry.

The misuse of cold remedies can be prevented by appropriate medical indications and accurate label claims. To that end, the U.S. Food and Drug Administration and the pharmaceutical industry have made it a standard procedure to routinely test drug products to ensure the accuracy of the amount of active ingredients. This application note presents a method for the simultaneous analysis of acetaminophen, dextromethorphan and phenylephrine. Method conditions and precision are presented. A cold medicine tablet is analyzed and the type and amount of active ingredient are confirmed.

In 2009, the United States Pharmacopeial Convention introduced the USP Dietary Supplements Compendium (DSC) – an industry directed resource featuring regulatory guidance, documents, supplemental information, and reference tools.

Ginseng has been used as an herbal medicine in Asia for over two thousand years for its purported various health benefits, including antioxidant, anticarcinogenic, antiinflammatory, antihypertensive and anti-diabetic. The pharmacologically active compounds behind the claims of ginseng’s efficacy are ginsenosides; their underlying mechanism of action although not entirely elucidated appears to be similar to that of steroid hormones. There are a number of ginseng species, and each has its own set of ginsenosides.

A great variety of isoflavone supplements and soy products, some additionally fortified, are available on the market today. Although a number of analytical methods for isoflavones exist, the goal of this work was to develop a simpler, faster and reliable LC method for the analysis of the six most widely-used isoflavones in soy products.

Because of the potential health benefit of isoflavones, many soy products and isoflavone supplements are available to consumers. This application note presents a fast, robust, and sensitive reverse phase liquid chromatography method for the analysis of six widely used isoflavones. Method conditions and performance data including precision and linearity are presented. Two soy dietary supplement tablets are analyzed and the isoflavones type and amount are confirmed.

In food, organic acids, such as malic, ascorbic and citric acids, originate from natural biochemical processes or are added as preservatives, acidulants and/or stabilizers. Organic acids contribute to the sensory properties of foods and beverages by providing both taste and aroma. In particular, citric acid is widely used in soft drinks to provide the sour citrus taste. The monitoring of these organic acids is essential for quality control during the processing of juices and related products, as well as for evaluating juice authenticity and purity. In addition, the use of organic acids in foods and beverages is regulated in many countries, though regulations vary widely. This application note presents a simple and robust HPLC method for the analysis of organic acids typically found in store-bought fruit juices.

Honey consumption has grown significantly during the last few decades due to its high nutritional value and unique flavor. The price of natural bee honey is much higher than,other sweeteners making it susceptible to adulteration with cheaper sweeteners, primarily sucrose. Besides lower levels of nonsugar ingredients, natural honey primarily consists of glucose and fructose and may contain low levels of sucrose and/or maltose. However, according to the international regulations, any commercially available “pure”-labeled honey products that are found to have in excess of 5% by weight of sucrose or maltose are considered to be adulterated. With the focus on possible honey adulteration, this application highlights the LC separation of various sugars found in honey and the analysis of these components in four storebought honey samples. Method conditions and performance data, including linearity and repeatability, are presented.

Patulin is produced by various molds, which primarily infect the moldy part of apples. Removing the moldy and damaged parts of the fruit may not eliminate all the patulin because some of it may migrate into sound parts of the flesh.

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.

Butylated hydroxytoluene (BHT) is a common food additive used to protect foods from spoilage. Concern exists that long-term human consumption of BHT may have potential health risks. Analysis of BHT is needed for both food quality and safety reasons.

The use of cannabis concentrates and CBD products (edibles, topicals, vape products, etc.) has increased in popularity as new regulation has been passed legalizing medicinal and recreational use in a number of states and provinces. Testing to ensure that pesticide and mycotoxin levels in cannabis products are below regulatory levels is critical, however, the cannabis concentrate matrix presents many analytical challenges including higher sample matrix effects and an increased concentration of cannabinoids in the sample.

In this application note, an LC/MS/MS method for the analysis of 66 pesticides (including hydrophobic and chlorinated pesticides typically analyzed by GC/MS/MS) and five mycotoxins in a cannabis concentrate matrix is presented. Utilizing a QSight® 420 LC/MS/MS instrument with dual APCI and ESI sources, the analysis yielded excellent recoveries and detection limits below those specified by the state of California cannabis regulations.

Sweeteners are low or zero-calorie sugar substitutes that are added in drinks, processed foods and pharmaceutical products to provide the sweet taste of table sugar, which is also called sucrose.

Heightened awareness of polycyclic aromatic hydrocarbons (PAHs) has become prevalent due to urban background levels found in surface water, soil, air, cosmetics and food. They are generated by the combustion of fossil fuels and are always found as a mixture of individual compounds that differ in behavior, environmental distribution, and their effect on biological systems. PAHs encompass a wide molecular weight range, differing based on their physical, chemical, and biological characteristics. PAHs in surface water result from a variety of sources including residential, industrial and commercial outlets, streets and parking lots, and atmospheric fallout. In this application, via a spiking experiment, we explore the levels at which PAHs in surface water can be monitored by UHPLC with a sub-2 µm particle sized column combined with photo diode array (PDA) and fluorescence (FL) detection.,

Today’s plastics are some of the most used materials on a global volume basis. Broadly integrated into today’s industrial and commercial lifestyles, they make a major, irreplaceable contribution to virtually every product category.

In this compendium you will find a wide range of applications for polymers, plastics, rubbers and advanced materials. Discover how to put these applications to work for you simply and efficiently.

Acetaminophen and aspirin are the drugs of choice used to relieve the symptoms of common headache. Acetaminophen, which is also called paracetamol, is widely used as a pain reliever (analgesic) and fever reducer (antipyretic). Because of its fast onset (eleven minutes after intake), acetaminophen is very effective. However, every year its misuse (dose exceeding the daily adult limit of four grams) can cause fatal liver damage. This application note presents a modified USP method for the analysis of aspirin, acetaminophen and caffeine using a superficially porous particle column and a PerkinElmer® UHPLC platform.

Presented is an alternative technique to quantitate benzodiazepines in plasma using a rapid protein precipitation method with a fast LC separation method in combination with TOF-MS.

This application note will present a fast, sensitive and reliable UHPLC analysis of six common parabens. A PerkinElmer Flexar FX-15 UHPLC system fitted with a Flexar FX PDA photodiode array detector was used. The separation was achieved using a PerkinElmer Brownlee Analytical C18, 1.9 µm 50 mm x 2.1 mm column.

Water polluted by herbicides leach and runoff can cause human health problems including cancer tumors, reproduction deformity, disruption of the endocrine system and DNA damage. This application presents a sensitive and robust liquid chromatography method to test nine widely used herbicides (Figure 1), using a 3 µm UHPLC column to achieve very high throughput at a low flow rate to reduce testing time and solvent consumption. The throughput is compared to that of a conventional C18 HPLC column. Method conditions and performance data including precision and linearity, are presented.

Food additives are natural or synthetic substances that are added in food, beverage and pharmaceutical products for their microbicidal, preservative and flavoring properties. 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).

Individuals typically use 5-20 cosmetics per day, many of which contain sunscreen to prevent skin damage from the sun’s radiation, and antimicrobial preservatives called parabens. Although sunscreen-active ingredients are designed to block UV radiation, some cell damage may be caused when these ingredients are illuminated by sunlight after absorption into the skin. For example, oxybenzone, an ingredient considered safe by the FDA (Food and Drug Administration), is believed to contribute to the recent rise in melanoma cases by increasing the production of DNA-attacking free radicals upon UV exposure. Additionally, studies have shown oxybenzone to behave similarly to the hormone estrogen, suggesting that it may also contribute to the development of breast cancer. Parabens are absorbed through the skin via cosmetic applications and can be found in nearly all adult urine samples, with the highest concentrations observed in adult females and adolescents. Furthermore, parabens are thought to have estrogenic activity, which affects the expression of genes regulated by the natural form of estrogen, leading to early puberty in girls and an increased risk for the development of breast cancer.

Alpha acids (a-acids) are a class of chemical compounds of primary importance in the production of beer. They are found in the resin glands of the flowers of the hop plant (Humulus lupulus) and are normally added to the boil after mashing the grains, providing beers with their aroma and bitter taste. The a-acids found in hop resins are isomerized to form the iso-a-acids during prolonged boiling in the wort. The degree of isomerization and the amount of bitter taste produced by the addition of hops is highly dependent on the type of hop and the length of time the hops are boiled. Longer boil times will result in isomerization of more of the available a-acids, making the beer more bitter. The a-acid percentages vary within specific varieties of hops, depending on the growing conditions, drying methods, age of hops, climate and other factors. Figure 1 shows the common a-acids and iso-a-acids involved in the beer brewing process. Since the quality and quantity of a-acids is so important in consistently providing individual beers with their recognizable taste, it is essential to monitor their amount in hops and beers and to monitor the formation of the iso-a-acids during the beer brewing process. The focus of this application note is to provide an easy, straightforward, and robust analytical method for establishing the type and amount of a-acids in hops pellets, as well as determining the amount of a-acids and iso-a-acids in various beers.

Whether you’re a lab manager or a bench chemist, you know firsthand how things are changing quickly in food and environmental analysis. And your lab needs to change to keep pace.

The Polymer Market consists of a huge diversity of manufacturers of industrial products running many different processes yet still facing similar challenges. There is more and more pressure to achieve high product quality and reduce costs in order to stay one step ahead of the competition.

Extractables and leachables studies are critical for maintaining the quality of your drug product and complying with GMP regulations during drug development and final batch release. Exposure to extractables and leachables could have a detrimental impact on the safety and efficacy of a final drug product. Testing for these contaminants is critical in every part of pharmaceutical packaging including the packaging system used to store drug products.

Over the past few years, there has been tremendous interest in approaches to speed up and/or increase the resolving power of the analytical separation process, particularly with the development of columns packed with porous sub-2 µm particles used in very high pressure conditions. Many laboratories want to transition some of their conventional HPLC methods to fast UHPLC methods, but their lack of experience some¬times acts as a deterrent to trying.

In this white paper, we share our experience in HPLC-to-UHPLC method transfer in the form of a tutorial introductory guide to help those who want to try this new and exciting UHPLC methodology to improve their productivity.