| 摘要 |
The invention relates to a method for determining the concentration of a substance in a sample in the presence of an interfering material by means of light absorption, and an apparatus therefore. By measuring the light absorbance at two different wavelengths the disturbing influences of interfering materials such as dust particles, dirt and bubbles may be compensated for. By also measuring the intensity of the light emitted from the light source but which has not yet passed through the measurement sample, simultaneously with the measurements of the absorbance of the light transmitted through the sample, at each wavelength measured, the true concentration may be determined by improved accuracy. The invention further relates to a method for packaging of a food product into packages, at least comprising the steps of sterilising a packaging material or packages by a sterilising medium containing a sterilising substance, filling of the sterilised packages with a food product and sealing of the packages, further comprising determining the concentration of the sterilising substance in the sterilising medium. It also relates to a machine arrangement for such packaging and filling of food products. |
