Operation Manual for - Mrclab.com

Ultrasonic milk analyzer1. GENERAL ..................................................................................................................................................................592. NECESSARY QUALITY PARAMETERS VALUES DETERMINATION .................................................................................592.1. LABORATORY METHODS .................................................................................................................................592.1.1. DETERMINATION OF FAT CONTENT .....................................................................................................................592.1.2. MILK DENSITY DETERMINATION .........................................................................................................................602.1.3. DETERMINATION OF TOTAL PROTEINS.................................................................................................................602.1.4. DETERMINATION OF CASEIN CONTENT IN THE MILK............................................................................................612.1.5. DETERMINATION OF SALTS IN MILK. ...................................................................................................................612.1.6. DETERMINATION OF SOLIDS IN MILK...................................................................................................................61EXPRESS METHODS BY USING ANOTHER MILK ANALYSERS.....................................................................61APPENDIX 3 MILK SAMPLING AND PREPARATION OF SAMPLES FOR ANALYSES...............................621. GENERAL ..................................................................................................................................................................622. STIRRING THE MILK AND ITS DERIVATIVES BEFORE SAMPLING .................................................................................623. SAMPLING.................................................................................................................................................................634. SAMPLE PRESERVATION............................................................................................................................................635. PREPARING THE SAMPLES FOR ANALYSES.................................................................................................................63APPENDIX 4 SAMPLING AND PREPARATION OF SAMPLES FOR VERIFICATION THE ACCURACYOF THE MILK ANALYSER, MAKING CORRECTIONS AND RECALIBRATION..........................................651. NECESSARY CONSUMABLES AND DEVICES ................................................................................................................652. GENERAL ..................................................................................................................................................................653. REPRESENTATIVE SAMPLES......................................................................................................................................654. SAMPLES PREPARATION ............................................................................................................................................675. ADVISABLE SCHEME FOR INDEPENDENTLY DETERMINATION THE CONTENT OF DIFFERENT PARAMETERS IN MILK ANDITS DERIVATIVES...........................................................................................................................................................685.1. FOR COW MILK (WHOLE MILK, LOW FAT, SKIMMED MILK) AND UHT MILK...............................695.2. FOR SHEEP MILK.................................................................................................................................................705.3. FOR WHEAT, BUTTERMILK AND CREAM....................................................................................................71APPENDIX 5: EASY CALIBRATION OF THE MILK ANALYSER BY CALCULATING THE BASICPARAMETERS VIA FORMULAS ..............................................................................................................................725.1. DETERMINATION SOME OF THE PARAMETERS BY FORMULAS.........................................................725.2. SNF DETERMINATION. ...........................................................................................................................................725.3. DETERMINATION OF LACTOSE CONTENT ................................................................................................................735.4. DETERMINATION OF SALTS CONTENT.....................................................................................................................735.5. DETERMINATION OF TOTAL PROTEINS CONTENT ....................................................................................................741. METHODS FOR DETERMINATION. ..............................................................................................................................752. THE BASIC FREEZING POINT. .....................................................................................................................................751. GENERAL INFORMATION ...........................................................................................................................................782. PH ELECTRODE.........................................................................................................................................................782.1. ELECTRODE PART ..............................................................................................................................................782.2. ELECTRODE CARE & ELECTRODE MAINTENANCE ................................................................................782.3. STORAGE................................................................................................................................................................782.4. AFTER USE.............................................................................................................................................................782.5. ELECTROLYTE REPLACEMENT (FOR REFILLABLE ELECTRODE ONLY)........................................792.6. NEW ELECTROLYTE PREPARATION:...........................................................................................................792.7. RE-USE THE ELECTRODE. ................................................................................................................................79Operation manual95/98