Applicazioni in Titolazione
La titolazione è uno dei metodi più antichi nella chimica analitica. È ben consolidata in vari settori. I nostri esperti di applicazioni hanno compilato numerosi documenti che presentano varie applicazioni della titolazione. Sono trattati diversi tipi di titolazione, ad esempio titolazione acido-base, titolazione redox o titolazione di precipitazione, nonché diversi settori, ad esempio industria alimentare, industria ambientale o industria farmaceutica.
Utilizza i filtri per cercare le nostre applicazioni di titolazione per analita/parametro, matrice campione, norma o settore.
- 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-210Assay of potassium carbonate and potassium bicarbonate
This Application Note presents a potentiometric titration method for a potassium bicarbonate and potassium carbonate assay meeting all USP General Chapter <1225> requirements.
- AN-T-111Valore di saponificazione degli oli alimentari
Il valore di saponificazione valuta la qualità dell'olio commestibile indicando il peso molecolare medio degli acidi grassi. La sua determinazione titrimetrica nell'olio di colza e di oliva è descritta qui.
- AN-T-192Determinazione della capacità neutralizzante degli acidi secondo USP<301>
Questa nota applicativa descrive in dettaglio la determinazione della capacità neutralizzante l'acido (ANC) in diversi campioni farmaceutici in conformità con gli standard USP<301>.
- AN-T-109Valore di iodio nell'olio di colza e d'oliva
Questa nota applicativa presenta un metodo modificato che consente di risparmiare tempo per determinare il valore di iodio (IV) negli oli commestibili basato su diversi standard (EN ISO 3961, ASTM D5554, ecc.).
- AN-T-110Valore dei perossidi negli oli alimentari
Questa Application Note descrive in dettaglio un metodo per determinare l'indice di perossido di grassi e oli commestibili basato su EN ISO 27107, EN ISO 3960, AOAC 965.33, Ph.Eur. 2.5.5 e USP<401>.
- 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)
