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Support & service (1)- AN-NIR-116Determination of iodine value in frying oils with NIR spectroscopy
Monitoring the iodine value in edible oil blends is crucial to produce vegetable oils with the desired properties. This Application Note displays the benefit of using the Metrohm NIRS DS2500 Liquid Analyzer for quality control in food laboratories.
- AN-NIR-114Determination of RON, aromatics, benzene, olefins, and density in reformate by NIRS
The determination of key quality parameters of reformate—namely research octane number (RON, ASTM D2699-19), aromatic content (ASTM D5769-15), benzene content, olefin content, and density—requires time-consuming and laborious conventional methods. In contrast, the Metrohm DS2500 Liquid Analyzer can measure all of these parameters, providing results within one minute without any sample preparation.
- AN-NIR-005AN-NIR-005Determination of coatings on nylon fibers by near-infrared spectroscopy
This Application Note demonstrates how NIR spectroscopy can be used to determine the content of coatings on nylon fibers, quickly and without requiring either sample preparation or the use of reagents. In order to suppress the effects arising from scattering on the surface coatings, one forms the second derivative spectra; the linear least-squares regression method is used to calculate the calibration function.
- AN-NIR-112Intrinsic viscosity (IV) determination of recycled PET by NIR spectroscopy
Near-infrared (NIR) spectroscopy is able to determine the intrinsic viscosity of rPET in less than one minute without any sample preparation. This Application Note demonstrates that the Metrohm DS2500 Solid Analyzer operating in the visible and near-infrared spectral region (Vis-NIR) offers users an easier way to perform this analysis without the use of toxic chemicals.
- AN-NIR-044Multiparameter Quality Control of Palm Oil with NIR Spectroscopy
Determination of key quality parameters of palm oil, namely free fatty acids (FFA), iodine value (IV), moisture content, deterioration of bleachability index (DOBI), and carotene require the use of several different analytical methods, which are laborious and can lack in accuracy. This application note demonstrates that the XDS RapidLiquid Analyzer operating in the visible and near infrared spectral region (Vis-NIR) provides a cost-efficient and fast solution for the determination of these quality control parameters in palm oil. With no sample preparation or chemicals needed, Vis-NIR spectroscopy allows for the analysis of palm oil in less than a minute and can be used by anyone.
- AN-NIR-110Quality control of sugarcane juice
Brix, Pol, juice purity, reducing sugars, and total recoverable sugars are some of the many quality control (QC) parameters that must be analyzed in sugarcane juice. An alternative to other analytical methods is near-infrared spectroscopy (NIRS). NIRS allows the fast, simultaneous determination of several QC constituents without chemicals or sample preparation.
- AN-NIR-113Research octane number (RON) determination in isomerate
The standard method to determine RON in isomerate is with expensive and maintenance-intensive engines. In contrast to this, the research octane number can also be analyzed by near-infrared spectroscopy (NIRS). NIRS provides accurate results within one minute without the need for any sample preparation or chemicals.
- AN-NIR-102Density of polyolefins measured by near-infrared spectroscopy
This Application Note shows the feasibility of NIR spectroscopy for the analysis of density in polyethylene granulates. Compared to the standard method, NIRS analysis shows a lower prediction error when air bubbles are present in PE pellets.
- AN-NIR-089Quality Control of Laminates
In the semiconductor industry, thermoset resins combined with fabric or paper are used as an intermediate layer between substrates of printed circuit boards (PCB). These polymer-based sheets (laminates) are chosen depending on thickness and their thermomechanical and electrical characteristics. Near infrared spectroscopy (NIRS) is a fast, non-destructive and easy-to-use analytical method which allows the measurement of multiple key quality parameters in less than a minute. The following Application Note describes the determination of the transition time of PCB laminates by NIRS, a parameter correlating with the thickness, glass transition temperature, and tensile strength of the material.
- AN-NIR-108Quality control of sugars in fruit juice
Near infrared spectroscopy (NIRS) allows the simultaneous determination of glucose, fructose, glucose, and total sugar content in juices without chemicals or sample preparation in less than one minute.
6.06008.017
Pre-calibration, coffee, solidOMNIS pre-calibration for determination of moisture and caffeine content in roasted coffee using NIR spectroscopy.
6.06008.007
Pre-calibration, CPO, liquidOMNIS pre-calibration for determination of iodine number, moisture, and free fatty acids in crude palm oil using NIR spectroscopy.
6.06008.012
Pre-calibration, CPKO, liquidOMNIS pre-calibration for determination of iodine number, moisture, and free fatty acids in crude palm kernel oil using NIR spectroscopy.
6.06008.016
Pre-calibration, PA6, solidOMNIS pre-calibration for determination of relative viscosity, carboxyl end-group content, and amine end-group content in polyamides (PA 6) using NIR spectroscopy.
6.06008.009
Pre-calibration, diesel, liquidOMNIS pre-calibration for determination of the cetane index, cetane number, density, cold filter plugging point and flash point in diesel oil using NIR spectroscopy.
6.06008.013
Pre-calibration, PET, solidOMNIS pre-calibration for determination of intrinsic viscosity, acid number, diethylene glycol content, and isophthalic acid content in poly(ethylene terephthalate) (PET) using NIR spectroscopy.
6.06008.008
Pre-calibration, gasoline, liquidOMNIS pre-calibration for determination of octane number, LCI, and density, along with the benzene, aromatic compounds, olefins, and oxygen content in gasoline using NIR spectroscopy.
6.6072.313
Pre-calibration for cannabisPre-calibration for the determination of the THC, CBD, CBG and water content of mortared and dried cannabis flowers using NIR spectroscopy.
6.06008.018
Pre-calibration, edible oil, liquidOMNIS pre-calibration for determination of the iodine value, refractive index, free fatty acid content, and fatty acid content of C16:0, C18:0, C18:1, C18:2, C18:3 in soy oil, sesame oil, sunflower oil, and rapeseed oil using NIR spectroscopy.
6.6072.314
Pre-calibration for human fecesPre-calibration for the determination of the dry mass of the fat content, the nitrogen content, the water content, and the calorie content using NIR spectroscopy
- Sep 5, 2022QC and product screening of medicinal cannabis with NIR spectroscopy
Near-infrared spectroscopy (NIRS) is a fast analytical technique with low running costs used to perform quality control (QC) and product screening on various cannabis products, including hemp. NIRS can determine the cannabinoid profile or even the potency of dried cannabis flowers, as well as for cannabis oils, waxes, tinctures, and other formulations.
- Oct 2, 2023Screening and quality control of palm oil with NIR spectroscopy
Near-infrared spectroscopy (NIRS) is an excellent fit for the analysis of several key quality parameters in crude palm oil (CPO), crude palm kernel oil (CPKO), and refined, bleached, and deodorized (RBD) palm oil. Just one NIRS instrument can measure multiple QC parameters including water (moisture) content, free fatty acids (FFA), iodine value (IV), and deterioration of bleachability index (DOBI) in a fraction of the time of other analytical techniques.
- Jan 15, 2024Pulp and paper QC and product screening with NIR spectroscopy
Paper products are primarily made from treated wood fibers processed through pulp and paper mills. This involves significant chemical use and energy consumption. Ensuring quality control throughout the production chain, from timber to the final paper product, is crucial. This blog article shows how near-infrared spectroscopy (NIRS) effectively monitors multiple key quality control parameters simultaneously during pulp and paper manufacturing.
- Aug 30, 2021NIR spectroscopy in the petrochemical and refinery industry: The ASTM compliant tool for QC and product screening – Part 1
Nea-infrared spectroscopy NIRS applications and parameters for the petrochemical, oil, and refinery industry.
- Nov 2, 2020Frequently asked questions in near-infrared spectroscopy analysis – Part 2
Learn about detection limits, accuracy, instrument calibration, and maintenance of near-infrared spectroscopy and near-infrared spectrometers.
- Apr 4, 2022Five myths about online dispersive NIR spectroscopy, FT-NIR, and FT-IR – Part 2
The benefits of near-infrared spectrometers over IR photometers in process analytical technology.
- Feb 7, 2022Five myths about online dispersive NIR spectroscopy, FT-NIR, and FT-IR – Part 1
Learn more about near-infrared and infrared spectroscopy and the differences.
- Sep 28, 2020Frequently asked questions in near-infrared spectroscopy analysis – Part 1
Learn more about the difference of IR and NIR, prediction models, norms using NIRS in regulated and non-regulated environments, and more in this FAQ blog post.
- Mar 7, 2022NIR spectroscopy: a 21 CFR Part 11 compliant tool for QC and product screening
Learn more about near-infrared spectroscopy as a 21 CFR Part 11 compliant tool to assess the quality of pharmaceuticals.
- Jun 14, 2021NIR spectroscopy in the polymer industry: The ideal tool for QC and product screening – Part 3