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(Trong thực tế, những giá trị A đo được khi C
min
→
0 thì có độ tin cậy không
cao vì giá trị A nằm trong khoảng dưới giới hạn phát hiện của thiết bị6
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14
14
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23
23
acid
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pH
A
R- + H+
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24
24
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25
λ
max
= 380nmλ
max
= 420nm
25