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A comparison was effectuated between the specific electrode and the CDR FOODLAB spectrophotometer that is used for the analysis of ammonia in samples of milk. In particular, the costs of each analysis and the time necessary for the carrying out of the same were evaluated. It can be observed that the CDR spectrophotometer requires an increased cost but less time for the analysis in respect of the analogous chemical analysis effectuated by the specific electrode. The total cost of the analyses effectuated using the CDR FOODLAB was reproduced and tested 7 times with the scope of making the cost comparable with the cost of the spectrophotometer, the membranes of which must be replaced every 7 tests.
The main aspect is the practicality in the overall aspects connected to the use of the two analytical instruments for the analysis of ammonia in samples of milk.
In fact, the CDR instrument requires less handling in respect of the addition of the R2 reagent. The analysis carried out via the specific electrode foresees a more consistent use of handling, glassware and reagents. In particular, with the specific electrode it is necessary to prepare a standard with a known concentration of ammonia chloride (1000 ppm) and a solution of soda 0.1N to add to the sample, with the consequent utilisation of the appropriate glassware (beaker, pipette, magnetic agitators….). Also the reading of the data is not immediate because it requires a concentrated evaluation within the scanning of the mV with the scope of correctly discovering the reaching of the plateau and the conversion of the result via the use of a suitable table.
The CDR analyzer instead, supplies a direct result expressed in terms of concentration of ammonia present in the sample of milk and does not require preliminary treatments of the sample or the use of glassware and reagents different from the R2 reagent.
You can find more information about FoodLab System and analysis for milk quality control in
www.cdr-mediared.com/food-diagnostics:
| The comparison effectuated between the specific electrode and the CDR FOODLAB spectrophotometer is been described in the relationship that you can download in pdf (135 KB). |
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