ResourceSpectroscopy

Maleic and Kojic Acid in Starch Applying UV/VIS Detection After Ion-Exclusion Chromatography

14 Sept 2015

Maleic acid findings in Asian food caused the recall of a lot of starch-containing food products in Asia. Long-term consumption of maleic acid can cause kidney problems. The cyclic kojic acid, on the other hand, is approved as an additive in food and cosmetics to preserve or to bleach, respectively. In this application note, both acids are determined in a single analysis using the 944 Professional UV/VIS Detector Vario and the 863 Compact IC Autosampler from Metrohm.

944 Professional UV/VIS Detector Vario

Metrohm AG

The 944 Professional UV/VIS Detector Vario is the intelligent UV/VIS detector from Metrohm. It permits a secure and reliable quantification of substances active in the ultraviolet or visible range. Detection takes place via a Diode Array. The 944 Professional UV/VIS Detector Vario enables reliable and accurate quantification of substances that absorb light in the ultraviolet or visible range. The instrument is operated by the user-friendly MagIC Net software and allows a wide variety of analytes to be determined by direct or indirect detection.   Features: UV/VIS detector equipped with diode array Up to 8 variable wavelengths Variable band widths and integration times Spectrum recording possible at any time User-friendly operation thanks to MagIC Net Many options for data evaluation and representation Universal use, many combination possibilities Robust, heatable reactor for precolumn and postcolumn derivatizations iReactor (intelligent derivatization reactor) High precision and measuring accuracy Low detection limits even in complex matrices Applications: Nitrogen compounds NO2 – , NO3 – , ... Sulfur compounds: S2–, S2O3 2–, SO3 2–, ... Halogen compounds: IO3 – , Br– , I– , ... Organic substances: - organic acids - vitamins - sweeteners - caffeine, melamine Other ions: CrO4 2–, SCN– , ...

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863 Compact IC Autosampler

Metrohm AG

Automating ion chromatography will save you costs while improving traceability and reproducibility of results.  The 863 Compact IC Autosampler has all standard functions and even allows a limited range of inline sample preparation. It is controlled by MagIC Net™ 1.1 but also from the front panel and by remote signals.

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930 Compact IC Flex Ion Chromatograph

Metrohm AG

The 930 Compact IC Flex is Metrohm’s new ion chromatograph for routine analysis developed with a focus on the requirements of contract laboratories and QC laboratories in all kinds of industries.

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Maleic and Kojic Acid in Starch Applying UV/VIS Detection After Ion-Exclusion Chromatography