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Polyaromatic Hydrocarbons - Pesticides
1. Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons (PAHs) are a group of substances that consist of at least two aromatic ring systems that are directly fused together. PAHs are primarily released into the environment via the air from technical and natural thermal processes and can accumulate in organisms.
PAHs are currently analysed using either gas or high-performance liquid chromatography (HPLC). In order to separate the structurally very similar PAHs with sufficient resolution via HPLC, special stationary phases are required that have a high selectivity for this group of substances.
For the separation of PAHs, MZ-Analysentechnik GmbH has developed MZ-PAH - a stationary phase especially for the requirements of modern HPLC environmental analysis. The base material is a wide-pored high-performance silica of exceptional purity and mechanical stability. A special modification process ensures the selectivity required for the separation of PAHs. This process guarantees the highest chromatographic resolution and excellent reproducibility.
The MZ-PAH guarantees the separation of 6 PAHs according to DIN 38407-F8 and 16 PAHs according to EPA Method 610.
2. Pesticides
Against the background of the Drinking Water Ordinance, the determination of plant treatment agents in water has developed into one of the most frequent applications of high-performance liquid chromatography in environmental analysis. The basis of the analysis is the DIN38407-F12 standardised method, which describes the determination of 17 substances, preferably active substances from the group of triazines and phenylureas. HPLC columns of the type MZ-PBM are ideally suited for the determination of nitrogenous plant treatment agents in accordance with DIN 38407-F12.
Nowadays, however, the requirements go far beyond the 17 substances defined there. MZ-PBM columns also fulfil the increased requirements in terms of efficiency and selectivity and enable the separation of 38 pesticide active substances/metabolites. The base material for the stationary phase is a C18-modified reversed-phase material with an average particle size of 3 μm, which is subjected to a special modification.
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