Amperometric Cholesterol Biosensors Based on the Electropolymerization of Pyrrole and Aniline in Sulphuric Acid for the Determination of Cholesterol in Serum

Figures & data

Figure 1. The effect of solution pH on the response of the biosensor.

Figure 2. The effect of temperature upon the sensitivity of the biosensor.

Figure 3. The effect of cholesterol concentration upon the amperometric response of the biosensor (Michealis-Menten plot).

Figure 4. The effect of cholesterol concentration upon the amperometric response of the biosensor (Lineweaver-Burk plot).

Figure 5. Measure number of the biosensor.

Figure 6. Storage stabilization of the biosensor.

Figure 7. SEM of Pt/Polypyrrole-Polyaniline.

Figure 8. SEM of Pt/Polypyrrole-Polyaniline-cholesterole oxidase-glutaraldehyde-albumin.

Figure 9. Response time of the biosensor.

Table 1. Comparison and determination with electrochemical method and cholesterol biosensor of cholesterol in human serum.

Blood samples	Electrochemical method (mg/100mL)	By the spectrophotometric method (mg/100mL)
1	160	218
2	110	157
3	105	153
4	78	119
5	76	112