Lampiran 5. Data FT-IR
a. Data FT-IR Edible Film Pati sukun- Kitosan = 1:1
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b. Data FT-IR Edible Film Pati sukun- Kitosan = 1:2
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Lampiran 6. Perhitungan Nilai WVTR Edible Film Pati sukun-kitosan
a. Data Mentah
Tabel Hasil Pengukuran Pertambahan Berat Edible film Pati sukun-Kitosan 1:1 X Waktu Y Berat XY X
2
1 2
3 4
5 6
7 8
9 10
ΣX=55
37.277 37.3115
37.3322 37.3557
37.3793 37.4022
37.4284 37.4539
37.4774 37.5028
37.5317
ΣY=411.4521
37.3115 74.6644
112.0671 149.5172
187.011 224.5704
262.1773 299.8192
337.5252 375.317
ΣXY=2059.98
1 4
9 16
25 36
49 64
81 100
ΣX
2
= 385
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Tabel Hasil Pengukuran Pertambahan Berat Edible film Pati sukun-Kitosan 1:2
X Waktu Y Berat XY X2
1 2
3 4
5 6
7 8
9 10
ΣX= 55 36.5212
36.5567 36.5777
36.6033 36.6265
36.6219 36.6784
36.7018 36.7265
36.7547 36.7849
ΣY= 403.1536 36.5567
73.1554 109.8099
146.506 183.1095
220.0704 256.9126
293.812 330.7923
367.849 ΣXY= 2018.574
1 4
9 16
25 36
49 64
81 100
Σ X
2
385
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Tabel Hasil Pengukuran Pertambahan Berat Edible film Pati sukun-Kitosan 1:3
X Waktu Y Berat
XY X2
37.4657 1
37.4988 37.4988
1 2
37.5194 75.0388
4 3
37.5424 112.6272
9 4
37.5657 150.2628
16 5
37.589 187.945
25 6
37.6136 225.6816
36 7
37.6339 263.4373
49 8
37.6609 301.2872
64 9
37.6851 339.1659
81 10
37.7122 377.122
100 ΣX=55
ΣY= 413.4867 ΣXY=2070.067
ΣX
2
= 385
Persamaan Garis Regresi secara umum Y= ax + b dengan metode least square nilai a diperoleh dengan persamaan :
Dimana: a slope =
Slope 1:1 =
= 0,024
Dengan cara yang sama pada edible film 1:1; 1:2 ; dan 1:3, dihitung slope masing masing data.
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Tabel Hasil Uji Ketebalan edible film dan perhitungan slope edible film pati sukun-kitosan
Parameter 1:1
1:2 1:3
Ketebalan mm 0,12
0,15 0,14
Slope gs
-1
0,024 0,025
0,023
Perhitungan Water Vapour Transmision Rate WVTR WVTR = slope luas sampel m2 = gm
2
jam 97 RH, 30 C
Pada Penelitian diameter d luas daerah yang terbuka terhadap transfer uap air pada film 1,3 cm.
Jadi jari-jari r = ½ d = ½ x 1,3 cm
= 0,65 cm
A =
2
= 3,14 x 0,0065m
2
= 1,327 x 10
-4
m
2
WVTR 1:1 = Slope A
= 0,024 x 10
-5
Kg s
-1
1,327 x 10
-4
m
2
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Dengan cara yang sama pada edible film pati sukun-kitosan 1:2 dan 1;3 dilakukan hal yang sama
Tabel Nilai WVTR edible film pati sukun-kitosan Parameter
1:1 1:2
1:3 WVTR
0,1808 Kg m
-2
jam
-1
0,1883 Kg m
-2
jam
-1
0,1733 Kg m
-2
jam
-1
y = 0.0245x + 37.282 R² = 0.9988
y = 0.025x + 36.524 R² = 0.9828
y = 0.0237x + 37.471 R² = 0.9988
36.4 36.6
36.8 37
37.2 37.4
37.6 37.8
2 4
6 8
10
B e
rat gr
Waktu jam
Grafik WVTR
1:01 1:02
1:03
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Lampiran 7. Perhitungan Nilai Sifat Mengembang Swelling Edible Film Pati-Kitosan
dimana : Wg = Berat sampel yang konstan didalam medium
Wo = Berat sampel awal
Untuk sampel 1:1 Nilai Swellingnya adalah Α =
x 100 = 88,105
Perhitungan yang sama untuk Sampel 1:2; dan 1:3 Sampel
Wg Wo
1:1 0,1418
0.0754 1:2
0,1661 0.0945
1:3 0,1462
0,0791
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Perhitungan Nilai Indeks Antimikroba No Kode Sample Diameter Zona Hambat Cm
1 2
3 4
5 6
E.Coli 1;1
0,807 E.Coli
1:2 Tidak menghambat
E.Coli 1:3
0,751 S.Aureus
1:1 0,912
S.Aureus 1:2
Tidak menghambat S.Aureus
1:3 0,646
Diameter Cakram Edible Film = 0,6 cm
Indeks Anti Mikroba =
Indeks Antimikroba E.Coli 1:1 = = 0,345
Dengan Cara yang sama ditentukan Indeks Antimikroba Pada edible film E. Coli 1:1; E.Coli
1:3; S.Aureus 1:1; dan S.Aureus 1:3
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BAB 3
METODE PENELITIAN
3.1. Alat dan Bahan