Citation:
SUN Wei, HAN Jun-Ying, JIAO Kui, LU Lu-De. Linear Sweep Voltammetric Determination of Protein with Beryllon Ⅱ as Probe[J]. Chinese Journal of Applied Chemistry,
;2005, 22(3): 242-245.
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Beryllon Ⅱ interacts with protein to form a supermolecular complex in a pH 4.3 Britton-Robinson (B-R) buffer solution and produces a sensitive reduction peak at -0.48 V (vs.SCE) on the hanging mercury drop electrode.According to the decrease of the reduction peak current without the shifting of the peak potential of beryllon Ⅱ after the addition of human serum albumin (HSA) to the above solution,a new linear sweep voltammetric determination method for protein is proposed.Under the optimal electrochemical conditions,the reduction peak current of beryllon Ⅱ decreases linearly with the HSA concentration ranged from 5.0 to 50.0 mg/L and the linear regression equation is Δi"p(nA)=49.83+3.65c(mg/L),γ=0.996 6.The method was applied to determine the content of HSA in human blood samples and the result was in good agreement with that obtained by the traditional Coomassie brilliant blue G-250 spectrophotometric method.The method was also used to determine bovine serum album in,bovine hemoglobin with satisfactory results.
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Keywords:
- protein,
- beryllon Ⅱ,
- linear sweep voltammetry
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