G. Biberauer et al., ANALYTICAL METHODS FOR THE CHARACTERIZATI ON OF SANITATION PRODUCT RESIDUES ON WORKING SURFACES IN THE MEAT INDUSTRY, Die Fleischwirtschaft, 75(8), 1995, pp. 1021-1024
Various methods of analysis to prove residual contamination of working
areas in meat production companies with cleaning and disinfection age
nts were examined. Due to constant monitoring of these agents the cont
amination of meat products was able to be prevented or at least minimi
sed already during the initial hygiene control. In solutions chemical
methods based on color reaction were very vague so that a quantificati
on was not possible. One of the colorimetric photometry methods for so
dium hyperchlorite is considered to be a specific method and allows a
continuous quantification. UV-Photometry leads only in ultra-clean wat
er to an unspecific detection of all examined sanitation products up t
o a concentration in ppm range. The direct on line inspection of worki
ng surfaces is possible with the Screening Electron Microscopy under L
ow Vacuum with Energy Dispersif X-ray spectroscopy-analysis (SEM-LV/ED
X), but this method allows only the characterisation of the inspected
surface and the detection of inorganic contaminations apported by the
detergent. The FT-IR-ATR (Fourier Transform - Infrared - Attenuated To
tal internal Reflection) method allows to characterise the residues of
sanitation products and proteins on polyurethane surfaces. The OSEE (
Optically Stimulated Electron Emission) method allows to detect mug qu
antites of detergent, disenfectant and organic residues per cm2 stainl
ess steel and polyrethane surface. It can be concluded that the UV-Pho
tometry is unsuitable for the determination of sanitation products und
er the conditions of meat industry. For the on line inspection of work
ing surfaces the OSEE-method allows the determination of small quantit
ies and with the FT-IR-ATR-method is possible to characterise the dete
cted residue.