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Moisture and ash determination in milk

閱讀：645 發(fā)布時間：2015-05-14

Suitable analyzers
n TGA Thermostep
Used accessories
n Ceramic crucible (26063)
n Spatula (23111)
n Quartz sand (90840)
Settings Step Moisture -------------> Step Ash
n Temperature: 105°C 600°C
n Speed: 0°C (= automatic) 0°C (= automatic)
n Type: Stop by deviation Stop by deviation
n Time: 0 sec 0 sec
n Deviation: 0.001 0.001
n Gas: Nitrogen Oxygen
Formulas
n Dry mass: 100 - ((X[0] - (X[1] - Y[1])) / X[0]*100)
n Ash (as analyzed): (X[2] - Y[2]) / X[0]*100
n Ash (dry base): (X[2] - Y[2]) / X[1]*100
Procedure
n Prepare and clean the ELTRA analyzer (e.g. remove ash from the
crucibles)
n Check pressure of the oxygen and nitrogen bottle
n Prepare the application according to the recommended settings
n Select this application in the TGA software; log in the sample names
and fill approximay 1-2 g of quartz sand (90840) into the crucibles
before the weight is taken by the internal balance
n Set the option "Balance Button" to "Yes"
n When the current crucible is placed on the pedestal fill in approximay
1 g of sample
n Remove the crucible carefully from the TGA carousel and mix the
quartz with the sample (e.g. with a quartz tube or a small spatula)
n Put the crucible back on the carousel and confirm the weight by
pressing the balance button

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Moisture and ash determination in milk

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