Operation Manual for - Mrclab.com

Ultrasonic milk analyzerstirred and titrated with 0,1 N soda caustic, till slight rose color is recovered.At the second titration the volume of the used soda caustic is measured.For sheep milkCasein content in sheep milk is determined on the same way. The onlydifference is that instead of 4 cm 3 38-40 % formalin in the milk are added 6cm 3 , and the standard/reference sample is prepared with 1 cm 3 4 % solutionof cobalt sulphate.4.7. CalculationsThe quantity of the 0,1 N soda caustic in cm 3 , used in the second titration,multiplied by the coefficient 0,7335 is equal to the casein content in the milkin percentages.The following tables could be used for quicker readings of casein'spercentage on the base of used cm 3 0,1 N soda caustic:Table ICalculation of casein content in the cow milk on the base of used cubiccentimeters 0,1 N soda caustic:0,1 n NaOH cm 3 Casein% 0,1 n NaOH cm 3 Casein % 0,1 n NaOH cm 3 Casein %3,00 2,20 3,35 2,46 3,70 2,713,05 2,24 3,40 2,49 3,75 2,753,10 2,27 3,45 2,53 3,80 2,793,15 2,31 3,50 2,56 3,85 2,823,20 2,35 3,55 2,6 3,90 2,863,25 2,38 3,60 2,64 3,95 2,903,30 2,42 3,65 2,68 4,00 2,93Operation manual 56/98