Application Finder

Two electrometric methods for determining the pH value of papers with homogeneous and heterogeneous pH cross-sections are described.

The present Application Bulletin contains NIR applications for the determination of important parameters for pulp and paper quality analysis. Each application describes the instrument that was originally used for the analysis, as well as the system recommended for the analysis and the results that were achieved thereby.

This Application Note describes how NIR spectroscopy can be used to determine residual lignin content in wood pulp. Using the major absorbance peaks of both lignin and cellulose in the second derivative spectra, the residual lignin content in wood pulp can be monitored during paper production.

Near-infrared spectroscopy (NIRS) is ideally suited to monitor the hardwood and softwood content in pulp and paper products.The herein described method bases on the fact that the changes in hardwood and softwood content are reflected in the intensity of the absorption bands of cellulose. A linear least-squares regression on second derivative spectra provide results that correspond very well with those of conventional laboratory determinations. With NIRS, an analytic method is available that provides results in real time.

In this Application Note, Vis-NIR spectroscopy (Vis-NIRS) is used to determine six wood pulp properties in a single measurement: kappa number, applied density, freeness, breaking strength, buckling strength and tensile strength.

The Kraft process is the dominant pulping process in the pulp and paper industry with the highest chemical recovery efficiency. In order to run each part of the papermaking process optimally, constant quality checks and analyses should be performed. This Process Application Note illustrates the straightforward online analysis of alkali (active, effective, total titratable alkali (TTA)), carbonate, hydroxide, sulfide and the causticizing degree (CE%) in pulping liquors using a 2060 Process Analyzer from Metrohm Process Analytics.

Raman analysis of fentanyl-soaked paper, SERS detection range for fentanyl on paper, and real-world example of fentanyl identification.

With MISA and MIRA, easy-to-use test kits and flexible sampling allow rapid and accurate interrogation of suspect materials with minimal time, training, and expense.