응용 분야 및 기법
- WP-057FOS/TAC Quotient for the optimization of methane production from biomass
The FOS/TAC value is an important characteristic to assess the status of the fermenter before costly problems arise. The new Eco Titrator from Metrohm allows the determination of this quotient in a fast, cost-efficient, and precise way.
- AB-220Determination of platinum and rhodium in the ultratrace range by adsorptive stripping voltammetry
This Application Bulletin describes …
- AN-CIC-035Halogens and sulfur in solid samples according to EN 17813
Organic halides must be monitored in the environment. Combustion ion chromatography (CIC) is used for accurate halogen analysis in solids following EN 17813:2023.
- AN-NIR-093Quality Control of fermentation processes
The production of biofuels from renewable feedstock has grown immensely in the past several years. Bioethanol is one of the most interesting alternatives for fossil fuels, since it can be produced from raw materials rich in sugars and starch. Ethanol fermentation is one of the oldest and most important fermentation processes used in the biotechnology industry. Although the process is well-known, there is a great potential for its improvement and a proportional reduction in production costs. Due to the seasonal variation of feedstock quality, ethanol producers to need to monitor the fermentation process to ensure the same quality product is achieved. Near-infrared spectroscopy (NIRS) offers rapid and reliable prediction of ethanol content, sugars, Brix, lactic acid, pH, and total solids at any stage of the fermentation process.
- AN-T-175Nicotine content in tobacco
Nicotine is a nitrogenous alkaloid that is hazardous to health and is characterized by a very high potential for addiction. The nicotine content in tobacco products must be determined and specified precisely. This Application Note exhibits an easy and straightforward method for nicotine determination in tobacco by non-aqueous titration.Results determined by GC and IC are given as a comparison. In comparison to chromatographic methods, titration is an «absolute method», meaning it is not necessary to calibrate the system prior to the analyses.
- AN-S-178Five anions in lignin
Determination of chloride, sulfite, sulfate, oxalate, and thiosulfate in lignin using anion chromatography with conductivity detection after chemical suppression.
- AN-S-173Nitrite and nitrate in a plant extract
Determination of nitrite and nitrate in a plant extract using anion chromatography with conductivity detection after chemical suppression.
- AN-U-074Determination of nitrite and nitrate in tobacco by ion chromatography with UV/VIS detection
Nitrite in tobacco facilitates the release of tobacco-specific nitrosamines. Most of these nitrosamines are carcinogenic. Therefore, the determination of nitrite in tobacco is required. This application describes the determination of nitrite and nitrate in acetic acid extracts of tobacco. The ion chromatographic separation is followed by UV/VIS detection after sequential suppression.
- AN-RS-040Trace Detection of DMT in Plant Matter
Modern recreational use of DMT (N,N-Dimethyltryptamine) is growing and although it is legally protected in some countries, new legislation attempts to reduce its abuse and associated adverse health effects. MIRA XTR DS from Metrohm Raman provides rapid and sensitive detection of DMT in the field.
- AN-T-154Determination of alpha acids in hops according to EBC 7.4
The alpha acid level (AA%) in hops plays a major role in the bitterness they can impart to beer. The AA% can vary between 1% up to 20% in hops. During boiling in the brewing process, alpha acids transform into iso-alpha acids which make the beer bitter. For this reason, it is important for brewers to know the exact AA value of the hops they use. The determination of AA% in hops with conductometric titration according to the EBC method 7.4 is shown in this Application Note.
