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Absorbance values for the red cabbage solutions at different pH

Here you can find all the values of absorbance we measured with the simple-spectrophotometer, for the solutions of red cabbage at pH 1 to 10, 12 and 14. The pH was measured thanks to pH paper, so the values might not be so accurate.

Values of the absorption (Mean & SD)​

Absorbance at pH 1​

MeanSD
R0,02660,0121
G1,5210,0248
B1,5310,0813

Absorbance at pH 2​

MeanSD
R0,03880,0125
G1,5550,0545
B1,6090,1317

Absorbance at pH 3​

MeanSD
R0,0450,0058
G1,4880,0275
B1,3820,0499

Absorbance at pH 4​

MeanSD
R0,090,0141
G0,4680,0526
B0,3040,0351

Absorbance at pH 5​

MeanSD
R0,12170,021
G0,30,036
B0,19170,026

Absorbance at pH 6​

MeanSD
R0,160,016
G0,290,034
B0,1840,027

Absorbance at pH 7​

MeanSD
R0,15860,012
G0,30860,015
B0,20710,015

Absorbance at pH 8​

MeanSD
R0,1920,018
G0,3140,024
B0,2220,022

Absorbance at pH 9​

MeanSD
R0,37670,0052
G0,29830,031
B0,23170,0098

Absorbance at pH 10​

MeanSD
R0,41330,021
G0,250,01
B0,28330,0058

Absorbance at pH 12​

MeanSD
R0,57330,055
G0,32670,015
B0,68670,025

Absorbance at pH 14​

MeanSD
R0,070,014
G0,26750,019
B1,09250,075

Exact values​

pH 1​

SamplesRGB
10,041,561,65
20,021,511,54
30,021,491,46
40,041,511,43
50,011,521,52
60,031,541,59

pH 2​

SamplesRGB
10,051,571,63
20,021,581,69
30,031,461,4
40,041,541,58
50,041,561,57
60,031,51,47
70,061,631,78
80,041,61,75

pH 3​

SamplesRGB
10,051,521,45
20,051,461,34
30,041,51,39
40,041,471,35

pH 4​

SamplesRGB
10,10,440,27
20,080,550,34
30,10,440,27
40,10,490,3
50,070,420,34

pH 5​

SamplesRGB
10,120,30,19
20,120,280,18
30,110,290,19
40,090,250,15
50,140,350,22
60,150,330,22

pH 6​

SamplesRGB
10,140,330,2
20,170,280,19
30,160,250,14
40,150,270,18
50,180,320,21

pH 7​

SamplesRGB
10,150,30,19
20,170,30,22
30,150,310,21
40,160,30,21
50,150,30,19
60,150,310,2
70,180,340,23

pH 8​

SamplesRGB
10,210,280,2
20,170,30,2
30,210,320,23
40,190,330,23
50,180,340,25

pH 9​

SamplesRGB
10,380,330,24
20,380,330,24
30,370,260,22
40,380,260,22
50,380,30,23
60,370,320,24

pH 10​

SamplesRGB
10,390,240,28
20,430,260,29
30,420,250,28

pH 12​

SamplesRGB
10,60,330,69
20,610,340,71
30,510,310,66

pH 14​

SamplesRGB
10,070,271,12
20,060,240,98
30,090,281,14
40,060,281,13