Download - Perhitungan Kadar Abukelompok 8
PERHITUNGAN KADAR ABU KELOMPOK 8
bahan : tempe
1. Berat setelah pengabuan
Rumus : berat krus+berat bahan setelah pengabuan – berat krus
Ulangan 10 = 13,525 – 13,2433
= 0,2817
Ulangan 11 = 13,5589 – 13,1232
= 0,4357
Ulangan 12 = 23,0695 – 23,0297
= 0,0398
2. Kadar abu dalam basis basah (bb)
Kadar abu (g/100 g bahan basah) = [(W 1−W 2)]
W x 100
Ulangan 10 = 0,28171,6121
x 100
= 17,47410
Ulangan 11 = 0,43571,6708
x 100
= 26,07733
Ulangan 12 = 0,03981,685
x 100
= 2,40048
Rata-rata kadar abu basis basah (bb)
= 17,47410+26,07733+2,40048
3
= 15,31730
3. Kadar abu dalam basis kering (bk)
Kadar abu (g/100 g bahan kering) = kadar abu(bb)
[100 ,−kadar air(bb)] x 100
Ulangan 10 = 17,47410[100−65 ]x 100
= 17,47410
35x 100
= 49,92601
Ulangan 11 = 26,07733[100−65 ]x 100
= 26,07733
35 x 100
= 74,50665
Ulangan 12 = 2,40048
[100−65 ] x 100
= 2,40048
35 x 100
= 6,858521
Rata-rata kadar abu basis kering (bk)
= 49,92601+74,50665+6,858521
3
= 43,76373
4. Standar Deviasi basis basah (bb)
SD = √ Σ(x−rata2 x)2n−1
=√ (17,47410−15,31730)2+(26,07733−15,31730)2+(2,40048−15,31730)2
3−1
= 11,98487
5. Standar Deviasi basis kering (bk)
SD = √ (49,92601−43,76373)2+(74,50665−43,76373)2+(6,858521−43,76373)2
3−1
= 34,24248
6. Perhitungan RSD/CV basis basah (bb)
CV = SD
rata2 x x 100
= 11,9848715,31730
= 78,2440
7. Perhitungan RSD/CV basis kering (bk)
CV = 34,2424843,76373
x 100
= 78,2440