19
Pesticides in Food
Pesticides in the broader sense are considered all crop protection products and all other pesticides. More understandable are maybe the terms with the following examples: to combat blight on grape vines a crop protection product is used, and to combat worms in apples, pears or also the cankers in cabbage, a pesticide is used. Each analysis requires the provision of a representative sample from the entire sample amount. Therefore, as a rule larger amounts of the product are usually available and it has to be ensured that through comminution and sample dividing, that a representative sample is added to the analysis instrument.
Tomato plants are treated with various pesticides. Hereby the spray chemicals end up on directly on the fruit, as well as directly in the soil and therefore indirectly via the transport of nutrients into the fruit. The consumer though desires unpolluted food. The production of food in the demanded quality is without the use of pesticides impossible. Consequently the necessity arises to inspect food in regards to possible residues. Often the sought after substances are temperature sensitive. This plays a major part during the preparation of the sample. Preparing tomatoes for analytical purposes is possible with the Mortar Mill Pulverisette 2, if the tomatoes are chopped into small chunks and embrittled with liquid nitrogen.
For this application, the Fritsch GmbH offers as accessories for the Mortar-Mill, a grinding bowl completely made of stainless steel. This bowl can be cooled down with liquid nitrogen and during the comminution liquid nitrogen may also be added. Therefore an absolutely cryogenic comminution in liquid nitrogen is possible. After a few minutes a fine homogenous powder is obtained. With the sample prepared in this manner a small amount can be weighed in for analysis.
Circle no. 359 ADVERTORIAL FT-NIR Food & Feed Solutions by Büchi: Quality in Your Hands from Lab to Production
For over 70 years the Swiss company Büchi Labortechnik AG has been one of the world‘s leading suppliers of key technologies for classical laboratory analyses, such as Soxhlet for fat and Kjeldahl for protein determination. With the establishment of NIR technology Buchi took the next and necessary step to provide a fast, non-destructive and cost effective product to perfectly complete its portfolio. Thus, during the last years Buchi has also become one of the main suppliers for quality control systems in the Food & Feed sector. Its FT-NIR Solutions are widely recognised as standard instruments in research institutes, private laboratories and production sites. The non–destructive real time scanning systems, like the modular NIRFlex N-500, enable users to measure solid, powder and liquid samples directly - no need for solvents or time-consuming sample preparation. The competence of Buchi`s customer support makes it a most wanted partner either for commonly used NIR applications, or for innovative experimental solutions. Buchi`s motto ‘Quality in your hands’ has always focused on providing high quality analytical solutions customised to specific needs.
In the field of Food & Feed production Buchi offers a number of robust quantitative applications with ready-to-use calibrations. Thus, the FT-NIR spectrometer can be used to analyse samples at the customer’s site from the very first day after installation. Examples of pre-calibrations for the food industry are: meat and derivates as ham or sausages, milk and cheese, cereals and rice, wheat and semolina flour as well as finished products of the bakery industry, vegetable oil and animal fats. Whatever the needs are, the pre-calibrated applications will manage them all.
Regarding flour, Buchi NIR systems enable the rheological analysis of parameters like the Chopin W and P/L or farinographic parameters like the baking absorption. Concerning vegetable oil the Buchi measuring cell NIRFlex Liquids allows the fast analysis of fatty acids to support the traditional GC analysis. To modify or expand the pre-calibrations or to develop new calibrations from scratch the field-proven and intuitive chemometric software NIRCal from Buchi offers a fast and straightforward way to develop robust calibrations. Thanks to the patented calibration wizard even unexperienced users will easily reach their target.
For more information visit
www.buchi.com. Circle no. 360
NIRSolutions®
Food
With more than 70 years of experience our solutions range from wet chemistry to NIR spectroscopy. Buchi NIRSolutions provide sustainability and efficiency for all kinds of food analyses. Our global NIR expert network fully supports you – wherever you are. The NIRFLex N-500 Fourier transform spectrometer will push your analytical methods onto the highest level.
Find out more on
www.buchi.com>NIRSolutions
BÜCHI Labortechnik AG 9230 Flawil / Switzerland T +41 71 394 63 63
www.buchi.com
Quality in your hands Circle no. 361
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40
