1-12 的 17 Business Insights
Food fraud and adulteration has become of particular concern to the industry over the past few years following reports of incidents in the media, with herbs and spices identified as one of the key problem areas. NIR spectroscopy used with the method outlined here can provide a rapid screening technique for detecting adulteration in herbs and spices.
Measuring the amount of metals in CNTs presents a challenge. High levels can be measured directly in the solid by several techniques, including XRF and TEM, while low-level analysis requires complete digestion of the sample prior to analysis by ICP-OES or ICP-MS.
In this work, we demonstrate that PerkinElmer's NexION? 2000 ICP-MS, with its unique RF generator and ion optics, coupled with the Syngistix? Nano Application Software Module, can be used to accurately measure and characterize NP sizes of 10 nm and smaller, both alone and in a mixture of NPs of various sizes.
In this work, samples were digested with aqua regia using reflux conditions according to DIN method 38414. After proper dilution of the digested sample solution, Hg was measured interference-free using SnCl2 as the reductant. The recoveries of spiked mercury in sewage sludge samples ranged from 96 to 100%. The method was checked by the analysis of standard reference materials. All results were in agreement with certified values. The RSD for three replicates was approximately 2% at 10 μg/L Hg level.
In the textile industry, the use of titanium dioxide (TiO2) nanoparticles (NPs) is increasing due to their ability to provide UV protection, increase the hydrophilic nature of fabrics, provide antibacterial characteristics, and reduce odors. This work studies the release of TiO2 NPs from various commercial textile products which do not advertise that TiO2 NPs have been added.
This work investigated the transfer of Ag and CuO nanoparticles from consumer products via simulated dermal contact by using textile wipes as a surrogate using PerkinElmer’s NexION ICP-MS single particle analyzer with the unique Syngistix Nano Application software module for data collection and analysis
The United States Pharmacopeia (USP) has announced that its new standards for elemental impurities in drug products will be implemented on January 1, 2018. General Chapters <232> and <2232> specify the list of elements and their permissible daily exposure (PDE) limits based on the route of administration.
This work demonstrates a robust method using SP-ICP-MS technology to detect CeO2 NPs which were extracted from soil samples with tetrasodium pyrophosphate (TSPP). Over the past few decades, engineered nanoparticles (ENPs) have been increasingly used in many commercial products. As a result, more and more ENPs have been released into the environment, which raises concerns over their fate, toxicity and transport therein.
Herbal lifestyle products are widely used as alternatives to medicines around the world, with as many as 80% of people using them as a primary source of healthcare in developing countries. These treatments are commonly regarded by scientific papers, and on some occasions the media, as being inferior to orthodox treatment. This is due to the variation between herbal formulations which will not be present in so called ‘single-chemical’ drugs. The reasons for the aforementioned variation involve several factors including storage, environmental conditions, handling and unintentional or intentional contamination (adulteration).
This work has demonstrated the ability of the NexION 2000 ICP-MS to analyze both natural and drinking water samples in Standard (i.e. non-cell) mode, in accordance with U.S. EPA Method 200.8. Accuracy has been demonstrated through the analysis of several reference materials and spike recoveries, with stability of at least nine hours. Method detection limits allow for trace-level determinations, while the ability to selectively suppress user-defined isotopes also allows the measurement of analyte levels usually only possible by ICP-OES or Flame AA. The NexION 2000 provides a comprehensive solution to the challenge of U.S. EPA Method 200.8 and other drinking and natural water analytical requirements across the globe.
Cisplatin, carboplatin, and oxaliplatin are the most widely used of platinum-based cancer chemotherapy drugs in the Western world. Cisplatin's effectiveness is due to its ability to bind to the DNA, resulting in DNA-platinum (Pt) adducts, which bend the DNA. The cells must then repair the DNA damage, otherwise DNA replication is blocked resulting in cell death. Many cancers are initially sensitive to platinum-based treatment, but patients frequently relapse with tumors displaying resistance to further cisplatin therapy.
Through the years, both industry and analytical instrumentation have advanced. With the development of new chemicals and processes, new pollutants may enter the environment. However, the capabilities of analytical instruments have also increased, allowing the measurement of ever lower levels of environmental contaminants, as well as new pollutants.
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