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Tomato Analysis Via The Big Freeze

Pesticides and other crop protection substances and methods are in widespread use across the world. Whether to protect plants from disease or insects or used to encourage faster, more bountiful growth, these chemicals and antibiotics pass through the soil into the plants and crops, eventually being consumed by humans.

Tomato plants are treated with various pesticides to ensure they are not damaged and produce a good yield. Chemicals are sprayed directly on to the fruit and soil, and end up within the plant, fruit and seeds by nutrient transport within the cells. Organic fertilisers are also taken up in the same way.

However, many consumers worry about the effects of these interventions on their food, and must be reassured that there is no danger relating to their use.

Much research has been conducted into the effects of these pesticides, chemicals and even natural fertilisers on animals and humans, and studies by the University of Paderborn are particularly interesting.

Analysis of the crops, such as tomatoes, requires a representative sample from the entire amount being studied. Through comminution and sample dividing, it must be ensured that a representative sample is used. Furthermore, the sought-after substances are temperature sensitive, placing further challenges on sample preparation.

This means specialist lab equipment is needed. FRITSCH offers a wide range of mills for sample preparation, and for preparing tomatoes cryogenically, the Mortar Mill PULVERISETTE 2 was the ideal choice for the research.

The fruit can be chopped into small chunks and embrittled with liquid nitrogen. A stainless steel mortar bowl can then be cooled with liquid nitrogen and even during the comminution, additional liquid nitrogen can be added. This means a complete cryogenic comminution with liquid nitrogen is possible. The tomato chunks float in the liquid nitrogen and after just a few minutes a fine homogenous powder is obtained.

This FRITSCH mortar mill means samples can be created quickly and easily, without risk of degradation or interference, ensuring ongoing studies are reliable, accurate and repeatable.

Date added: 2015-05-25 11:33:47