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melkzuurgehalte in melkpoeder
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het verslag voor proef TI107 melkzuurgehalte berekenen in melkpoeder
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Noëlla OostTitel SWLOM1A
TI107 – het melkzuurgehalte in melkpoeder. 03-04-2020
Doel
Het bepalen van het melkzuurgehalte in melkpoeder.
Uitvoering
Volgens voorschrift practicumhandleiding bladzijde 4-6.
Meetresultaten
Onderdeel 1:
Buret beginstand 0,25 ml
Buret eindstand 6,15 ml
Toegevoegd 5,90 ml
mg melkzuur per ml NaOH 15,25 mg melkzuur per ml NaOH
Onderdeel 2:
Bepaling A B C D
ml’s Melkzuur opl 50,00 50,00 50,00 50,00
Eindstand 33,55 31,30 36,05 34,15
Beginstand 2,25 0,10 4,80 2,95
Toegevoegd 31,30 31,20 31,25 31,20
mg Melkzuur per 14,38 14,42 14,40 14,42
ml:
Concentratie 9,002 8,998 9,000 8,998
MZ/L
Berekeningen
Onderdeel 1:
10 ml x 9,000 mg/ml = 90 mg Melkzuur
6,15 – 0,25 = 5,9
,9 = 15,25 mg Melkzuur per ml NaOH
Onderdeel 2:
A: 9 x 50 = ,30 (toegevoegd) = 14,38
31,30 (toegevoegd) x 14,38 (mg melkzuur per ml) x 20 = 9001,88 mg/L
= 9,002 g Melkzuur/L
Gemiddeld: (9,002 + 8,998 + 9,000 + 8,998) / 4 = 8,9995 g/L
= 9,000 g/L
Standaarddeviatie: 0,002
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