Titration applications
Titration is one of the oldest methods in analytical chemistry. It is well-established in various industries. Our application experts have compiled numerous documents presenting various applications of titration. Different types of titration, e.g., acid-base titration, redox titration, or precipitation titration as well as different industries, e.g., food industry, environmental industry, or pharmaceutical industry are covered.
Use the filters to search our titration applications by analyte/parameter, sample matrix, norm, or industry.
- AN-T-112Acid value and free fatty acids in edible oils
This Application Note describes the titration of acid value and free fatty acids in different edible oils, based on the standards EN ISO 660, USP<401>, and Ph.Eur. 2.5.1.
- AN-T-111Saponification value of edible oils
The saponification value evaluates edible oil quality by indicating the average molecular weight of fatty acids. Its titrimetric determination in canola and olive oil is described here.
- AN-T-192Determination of acid-neutralizing capacity according to USP<301>
This Application Note details the determination of acid-neutralizing capacity (ANC) in several pharmaceutical samples in compliance with USP<301> standards.
- AN-T-109Iodine value in canola and olive oil
This Application Note presents a modified time-saving method to determine iodine value (IV) in edible oils based on several standards (EN ISO 3961, ASTM D5554, etc.).
- WP-053Determination of Acid Number (AN) with Titration and NIR Spectroscopy
The acid number (AN) is a measure for the quality of oils and their potential to enhance corrosion. When analyzing fresh, unused oils, the AN is used to ensure the specified quality from the manufacturer, whereas for used oils the AN is determined to observe its increase until a critical level is reached. Although it is generally assumed that the AN correlates to the corrosive potential of the oil, this is not exactly correct, as it is the change of the AN value which indicates this issue. Therefore it is necessary to determine the AN on a regular basis.Several standards already exist to determine AN via titration methods, however it is also possible to measure this parameter via spectroscopic (NIRS) methodology. No matter which technique you choose, Metrohm has you covered with high-performance instruments suitable for these published norms.
- 8.000.6066Determination of the total acid number (TAN) using thermometric titration
The thermometric titration method presented here permits a simple and direct determination of the total acid number (TAN) in petroleum products. It is an invaluable alternative to current manual and potentiometric methods. Thermometric titration uses a maintenance-free temperature sensor that does not require rehydration and is free of fouling and matrix effects. The procedure requires minimal sample preparation. Results agree closely with those from the potentiometric titrimetric procedure according to ASTM D664, but the thermometric titration method is far superior in terms of reproducibility and speed of analysis, with determinations being complete in approximately one minute.
- AN-T-092Acid number in insulating, transformer and turbine oils – Use of a photometric sensor increases precision and reliability for the determination according to ASTM D974
The acid number (AN) of insulating, transformer, and turbine oils is crucial to ensure safe operation, operating equipment control, and corrosion prevention. These oils generally have low AN specifications and their AN determination by manual color-indicator titration is difficult, especially when analyzing colored samples.Using a Titrator with a photometric sensor to detect the end point ensures that the titrations are always carried out under the same conditions. This greatly increases the precision and reliability of the results, which in turn results in improved monitoring for your operations.
- AN-H-088Automated determination of total acid number (TAN) in oils
Automated determination of total acid number (TAN) in new and used lubricating oils and crude oils using the 814 USB Sample Processor. Dissolve oil sample in mixture of toluene and 2-propanol, add paraformaldehyde and titrate with 0.1 mol/L or 0.01 mol/L KOH in propan-2-ol. The endpoint is indicated by an endothermic response caused by the base-catalyzed depolymerization of paraformaldehyde.Reference: 1. M. J. D. Carneiro, M. A. Feres Júnior, and O. E. S. Godinho. Determination of the acidity of oils using paraformaldehyde as a thermometric end-point indicator. J. Braz. Chem. Soc. 13 (5) 692-694 (2002)
- AN-H-073Determination of total acid number (TAN) in biodiesel
Determination of Total Acid Number (TAN) values in biodiesel to <0.05 mg KOH/g sample.
- AN-T-032Sulfide and hydrogen sulfide in water
This Application Note presents a potentiometric titration method for trace H2S analysis in water on an OMNIS system using silver nitrate and an Ag Titrode.
