ICUMSA Method GS6-7 (2007)
Material: Sugar Beet
Analytes: Potassium, Sodium
Method Technique: Spectrophotometry
Abstract:
This method is used for the determination of the contents of potassium and sodium in sugar beet brei after extraction and defecation using lead acetate or aluminium sulphate respectively.
For ecological and health reasons, the defecation using lead acetate should be avoided whenever possible.
The method is applicable to all clear dissolved samples of sufficiently low viscosity. The ranges of measurement as described here are (3 to 80) mmol/kg beet for potassium and (1 to 50) mmol/kg beet for sodium.
Statistical data on the repeatability and reproducibility of the method were elaborated by conducting an international collaborative study.
| Metal | Average nitrogen content in beet (mmol/kg) | Repeatability r (mmol/kg) | Reproducibility R (mmol/kg) |
| K | 37.29 | 1.56 | 7.51 |
| Na | 6.92 | 0.84 | 2.72 |
Online Access to ICUMSA Method GS6-7 (2007)
Access to the online Version of ICUMSA Method GS6-7 (2007) can be obtained from the Sugar Industry Website, operated by Bartens. The online access for two years costs EUR35 (+ 19 % VAT for German and EU citizens without EU VAT No.).