Acara 6 Praktikum

Question 1

1. Uji Gula : Alat & Metode

Answer 1

Alat :
Tabung reaksi, pipet filler, bunsen
Reagen : Selliwanoff

Metode :
Susu 2ml + tabung reaksi → Seliwanoff 2,5 ml → homogen → panaskan mendidih 30-45 detik

Question 2

1. Uji Gula : Interpretasi

Answer 2

Intepretasi :
(+) merah
(-) putih/kuning
Gula + susu → susu kental → osmosis naik → air di bakteri terhisap → bakteri mati → masa keasaman panjang

Question 3

2. Uji Karbonat dgn Methanol

Answer 3

Alat :
Pipet ukur, tabung reaksi
Reagen : Methanol

Metode :
2 ml susu + 3ml methanol (2:3) ke tab reaksi → kocok

Interpretasi :
(+) campuran homogen → beberapa jam ada presipitasi halus
(-) bbrp detik dah ada presipitasi

Question 4

3. Uji Karbonat dgn Neutral Red

Answer 4

Alat :
Tabung rekasi, pipet ukur, filler
Reagen :
Alkohol 92% / 95%
Neutral red

Metode :
(susu : alkohol : NR = 1ml : 1ml : 1 tetes) masuk ke tab reaksi → homogen

Interpretasi :
(+) kuning
(-) TAP (merah muda)

Question 5

4. Uji Formalin

Answer 5

Alat :
Pipet dan filler, tab reaksi
Reagen :
FeCl3 1% → ngikat protein
H2SO4 pekat → nglepas ikatan formalin + MCP
Aquades

Metode :
Susu 10ml + 0,5ml FeCl → aquades 10ml → homogen → H2SO4 10 ml

Interpretasi :
(+) cincing ungu
(-) TAP

Question 6

5. Uji CMT

Answer 6

Alat :
Gelas arloji, pipet tetes, tusuk gigi
Reagen CMT:
alkil aryl sulfonat 1%
NaOH 1,5%
Brom Cresol Blue

Metode :
Campur 5 tetes susu + 5 tetes CMT

Intepretasi :
(+) ada jonjot
(-) tdk ada jonjot

Question 7

6. Uji IPB-1

Answer 7

Alat :
Gelas arloji, pipet tetes, tusuk gigi
Reagen : IPB-1

Metode :
Campur 5 tetes susu + 5 tetes reagen

Intepretasi :
(+) ada jonjot
(-) tdk ada jonjot

Question 8

7. Uji Detergent 5%

Answer 8

Alat :
Gelas arloji, pipet tetes, tusuk gigi
Reagen : Detergent 5%

Metode :
Campur 5 tetes susu + 5 tetes reagen

Intepretasi :
(+) ada jonjot
(-) tdk ada jonjot

Question 9

8. Uji WST

Answer 9

Alat :
Gelas arloji, pipet tetes, tusuk gigi
Reagen : NaOH 4%

Metode :
Campur 5 tetes susu + 5 tetes reagen

Intepretasi :
(+) ada jonjot
(-) tdk ada jonjot