Chromatography

Sample preparation is a crucial step in any analytical method, especially in chromatography where samples have to be homogenous, free of interferences and safe for the column. Today, one of the most widely used sample preparation methods is solid-phase extraction (SPE) that in the mid 1990s largely replaced the conventional but time consuming liquid-liquid extraction […]

In September 2008 almost 52,000 infants in China suffered urinary problems from consumption of melamine contaminated baby-formulas and some other dairy products (WHO, 2009). By the end of November 2008 almost 300,000 infants were affected and six deaths have been confirmed by the Chinese Ministry of Health. A low level of melamine contamination was also found […]