Приложения
- AB-057Polarographic determination of nicotine
The quantitative determination of the alkaloid nicotine, which is an essential constituent of the tobacco plant, can be carried out by polarography. The quantification limit is less than 0.1 mg/L in the polarographic vessel.
- AN-NIR-027Identification of 46 medicinal and aromatic plants for the cosmetics and pharmaceuticals industry
This Application Note shows how, with the help of Vis-NIR spectroscopy and a special plant library, 46 different medicinal and aromatic plants, e.g., Organicum majoricum and Tilia cordata, can be conveniently identified on the basis of their spectrum. In comparison with alternative methods for the determination of plants, which are elaborate and require experienced scientists for their performance, the Vis-NIR method permits rapid and uncomplicated identification.
- 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-C-168Determination of ammonium in tobacco after sulfuric acid extraction
Ammonia is present in tobacco – either naturally or added – and is realesed during smoking. Ammonia increases the appeal of smoking, and is therefore considered to increase the addictive potential. The determination of ammonium in tobacco is performed by acid extraction and ion chromatographic separation followed by non-suppressed conductivity detection.
- AN-N-010Chloride, nitrate, phosphate, and sulfate in plant leaf extracts
Determination of chloride, nitrate, phosphate and sulfate in plant leaf extracts using anion chromatography with direct conductometric detection.
- AN-P-029Polysaccharides in a plant extract
Determination of polysaccharides (n glucose units) in a plant extract using pulsed amperometric detection and a high-pressure gradient.
- 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-V-032Zinc, cadmium, lead, copper, iron, nickel, and cobalt in freeze-dried hops
Determination of Zn, Cd, Pb, Cu, Ni, Co, and Fe in freeze-dried hops after a wet digestion.
- AN-T-212FOS/TAC in fermentation substrate – Reliable determination for the monitoring of biogas plants
The FOS/TAC value, sometimes referred to as VFA/TA, is a meaningful parameter for assessing both the current condition and the development of anaerobic digestion processes in a digester of a biogas plant. Knowledge of this value can help decrease the risk of acidification problems, which can result in a costly crash of the entire digestion process. Therefore, an accurate and reliable determination of the FOS/TAC value is important for both efficient and cost-effective production operations. This value is determined by an acid-base titration. Using the Eco Titrator from Metrohm equipped with an Ecotrode plus electrode, a reproducible and accurate determination of the FOS/TAC value is possible.
- 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.
