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Support & service (1)- AN-NIR-005AN-NIR-005Détermination des enrobages sur fils de nylon dans les granulés de polymères par spectroscopie proche infrarouge
Cette Application Note montre comment la fraction d’enrobage en fibres de nylon peut être rapidement déterminée à l’aide de la spectroscopie proche infrarouge sans préparation d’échantillons et sans utiliser de réactifs. Pour supprimer les effets dus à la dispersion au niveau des couches superficielles, on calcule la deuxième dérivation des spectres ; la méthode de la régression linéaire (ou méthode des moindres carrés) sert à calculer la fonction de calibrage.
- AN-NIR-022Contrôle de la qualité de l'essence
Ces dernières années, les efforts se sont multipliés pour réduire l'impact des carburants sur l'environnement en améliorant leur qualité. La détermination des principaux paramètres de qualité de l'essence, à savoir l'indice d'octane recherche (RON, ASTM D2699-19), l'indice d'octane moteur (MON, ASTM D2700-19), l'indice anti-coups (AKI), la teneur en aromatiques (ASTM D5769-15) et la densité, nécessite traditionnellement plusieurs méthodes analytiques différentes, qui sont laborieuses et requièrent un personnel qualifié. Cette note d'application démontre que l'analyseur XDS RapidLiquid, fonctionnant dans la région spectrale du visible et du proche infrarouge (Vis-NIR), constitue une solution économique et rapide pour l'analyse multiparamétrique de l'essence.
- AN-PAN-1053Monitoring of DOTP production via esterification with inline analysis
This Process Application Note presents a way to closely monitor multiple parameters simultaneously during the dioctyl terephthalate production process with near-infrared spectroscopy.
- AN-PAN-1051Inline process monitoring of the moisture content in propylene oxide
This Process Application Note presents a method to closely monitor low levels of moisture in propylene oxide safely and reliably by using a single explosion-proof inline process analyzer.
- AN-NIR-111Iodine value, FFA, refractive index, and fatty acid composition in edible oils
Near-infrared spectroscopy can quickly determine multiple edible oil quality parameters simultaneously without sample preparation as shown in this Application Note.
- AN-PAN-1062Online monitoring of sulfuric acid and hydrogen peroxide using Raman spectroscopy
Etching is a vital process in semiconductor fabrication, involving the chemical removal of layers from the wafer substrate. Strict quality control measures are necessary to determine acid etchant concentrations in mixed acid solutions (e.g., SPM, DSP, or DSP+), critical for optimizing etch rate, selectivity, and uniformity during multiple wafer etching steps. This application presents a method to measure sulfuric acid and hydrogen peroxide in etching baths simultaneously using Raman spectroscopy with the PTRam Analyzer from Metrohm Process Analytics.
- 410000046-A410000046-AQTRam® for Content Uniformity Analysis of Low-Dose Pharmaceutical Tablets
In this note, we use a model drug, acetaminophen, to demonstrate the capability of QTRam® to quantify low concentrations of API in compressed tablets.QTRam® is a compact transmission Raman analyzer designed specifically for content uniformity analysis of pharmaceuticals in solid dosage forms.
- 410000053-A410000053-AQuantitative Analysis of a Water-soluble Polymer Using the i-Raman EX Spectrometer
Quantitation of the functionalization of a water-soluble polymer was achieved using a portable Raman spectrometer. The Raman spectrum provides strong, unique bands for both the initial and fully reacted polymer. This enables development of a simple, robust quantitative analysis of the percent polymer functionalization. This method is now routinely used in a manufacturing plant's quality control laboratory.
- 410000013-A410000013-AFast and Selective Detection of Trigonelline, a Coffee Quality Marker, Using a Portable Raman Spectrometer
Portable Raman is used to quantify trigonelline, an alkaloid that contributes to the health benefits of some foods. A simple method to quantify the presence of diluted trigonelline in solutions using surface enhanced Raman spectroscopy is described. Portable Raman is a tool that could be used in quality control of food items such as coffee and quinoa.
- 410000016-A410000016-AQuantification of Urea in Ethanol by Raman Spectroscopy
Urea in widely employed as a nitrogen-release fertilizer with more than 90 % of urea production destined for agricultural applications. Urea is also known to form complexes with fatty acids, which have been employed for separation of complex mixtures and purification processes. In this application note, we present the quantification of the concentration of urea in ethanol by Raman Spectroscopy and show how this method can be employed for determining the percentage of urea in a solid inclusion compound with stearic acid.
