HPLC Sampling Articles
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Vaccine Quality Control: Total Protein Determination by TN Analysis
Vaccine quality: Determine total protein content using TN analysis TN stands for the total nitrogen. The sum parameter is easy to measure and allows safe and reliable conclusions about the total protein content in a pharmaceutical aqueous solution. The total protein content is an important quality parameter in pharmaceutical vaccine production. This article explains how you can determine the ...
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Analysis of Tetrahydrocannabinol Vape Oils Using Pyroprobe by Thermal Extraction
Abstract This application note demonstrates a multi-step thermal extraction study on Tetrahydrocannabinol (THC) vape oils. Introduction E-cigarettes have gained popularity in recent years, in conjunction with the legalization of marijuana in many U.S. states. Authentic THC vape oils are not easily distinguishable from the counterfeits, which are poorly regulated and can cause severe lung ...
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Predicting the Toxicity of Oil-Shale Industry Wastewaters by its Phenolic Composition
Abstract : The chemical composition and toxicity of five phenolic wastewaters samples collected from the Kohlta-Järve (Estonia) oil-shale industry region were analysed. The total phenolic contents (HPLC data) of these samples ranged from 0.7 mg/l to 195 mg/l. A total of 11 phenol (up to 84 mg/l) and p-cresol (up to 74 mg/l). Artificial phenolic mixtures were also composed, to mimic the ...
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Cannabis quality tests now much faster thanks to HPLC
A new method of measuring phytocannabinoids has been developed and HPLC has been found to hold the key to faster measurements times. Read on to learn more and to discover our nitrogen generators for HPLC – ELSD. Researchers from the University of British Columbia have created a new method of measuring phytocannabinoids which is more than twice as quick as traditional methods. ...
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HPLC prep - which filter fits your chromatography sample best?
Sample filtration protects your HPLC column and preserves data quality. Read our tips on filter and solvent selection and the use of tools to save time in HPLC prep, improve lab efficiency, and better your analytical chemistry techniques. Filtering samples prior to high-performance liquid chromatography (HPLC) analysis can help avoid frit clogging while maintaining data quality. Adding a ...
By Cytiva
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Clean your test sieves to maintain accurate results
A standard process in analytical laboratories is sieve analysis, the practice of accessing the particle size distribution of a granular material. The trouble is, sieves prove quite the challenge to clean thoroughly enough to get all the contaminants out of the mesh. Every last grain stuck in the sieve must be removed to gain accurate analysis. A solution has been found in the use of ultrasonic ...
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Hollow-fiber-supported liquid-phase microextraction using an ionic liquid as the extractant for the pre-concentration of bisphenol A, 17-β-estradiol, estrone and diethylstilbestrol from water samples with HPLC detection
A new method for the determination of four endocrine disrupting compounds (EDCs) (bisphenol A, 17-β-estradiol, estrone and diethylstilbestrol) in water samples has been developed using polypropylene hollow-fiber-supported ionic liquid (IL, 1-Octyl-3-methylimidazolium hexafluorophosphate, [C8MIM][PF6]) microextraction [HF-liquid-phase microextraction (LPME)] combined with high-performance ...
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News on Air 2013, Volume 1: Products for Sampling
For decades, Sigma-Aldrich has been a key supplier of innovative & high technology air monitoring products for various areas of gas/air sampling. Enclosed, you will find an overview on new and interesting devices to improve or simplify your air sampling. Supelco and Sigma-Aldrich offer a range of active and passive air sampling products, in addition to various analytical chemistry tools ...
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