Applications
- 410000048-AA-Mode: Customizable Library Capabilities for Advanced Users with the TacticID®-GP Plus Handheld Raman System
The TacticID®-GP Plus has multiple measurement modes to support safety and security users. A-Mode allows the user to create library Raman or SERS spectra customizable for spectral search range and hit quality index (HQI) threshold. A-mode is of beneficial use to forensics laboratories that would like to utilize expansion of SERS detection of designer drugs specific to their geographical regions or for food safety in perspective markets. In this example, A-Mode is used to create a SERS library of melamine to easily detect the presence of melamine in infant formula using a single indicator peak.
- AB-098Determination of ascorbic acid (Vitamin C) and its compounds
In addition to its natural occurrence in fruit and vegetables, ascorbic acid (Vitamin C) is used as an antioxidant in foods and drinks. Ascorbic acid is furthermore also to be found in numerous drugs.Ascorbic acid and its salts and esters can be determined with titration or by using polarography, for which ascorbic acid is oxidized to form dehydroascorbic acid.Bi-voltammetric or photometric equivalence point indication can be used for titrimetric determination. It must be taken into account here that only bi-voltammetric indication is independent of the inherent color of the sample. Polarography is the most selective of the methods described, as other reducing or oxidizing substances are not recorded.
- AB-443Determination of Glycerin Purity by Potentiometric Titration
This method is applicable to all samples containing glycerin in the absence of other triols or other compounds that react with periodate to produce acidic products. Glycerin may be determined in the presence of glycols. A periodate solution reacts slowly with diols and triols in acidic aqueous media at room temperature. A quantitative amount of formic acid is generated from the reaction with glycerin (a triol). The reaction with diols produces neutral aldehydes. The amount of formic acid generated by this reaction is determined by titration against sodium hydroxide.
- AN-H-061Direct titration of sodium
Determination of sodium in salts, process solutions, and foods.
- AN-H-087Determination of hydrofluoric acid by aluminum titration
Determination of hydrofluoric acid in mixed acid etchant solutions.
- AN-H-097Determination of calcium and magnesium in harvested salt
A measured amount of salt is titrated directly with a solution of 1 mol/L tetrasodium EDTA to thermometrically determined endpoints for Ca and Mg. Acetylacetone is added to alter the Ca and Mg EDTA stability constants for better endpoint sharpness.
- AN-H-111Determination of sulfate in harvested salt
Sulfate is precipitated as barium sulfate by reaction with an acidified barium chromate solution. The excess barium chromate is precipitated by basification with ammonia solution. Residual soluble chromate, equivalent to the sulfate content of the sample, is titrated with a solution of standard ferrous ion to a thermometrically determined endpoint.
- AN-NIR-106Quality control of non-nutritive sweeteners with NIR spectroscopy
Near-infrared spectroscopy (NIRS) allows the simultaneous determination of sweeteners such as Stevia and sucralose in blends in less than one minute without any chemicals or sample preparation.
- AN-O-024Citrate, ascorbate, and acetate in a food additive
Determination of citrate, ascorbate, and acetate in a food additive using ion-exclusion chromatography with suppressed conductivity detection.
- AN-O-025Sorbate and benzoate in functional drinks
Determination of sorbate and benzoate in a functional drink using ion-exclusion chromatography with suppressed conductivity detection.
