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Albumin Analysis by Potentiometric Method. situation Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) 0 ppm0.2530.14069.82-68.88 First 3 ppm albumin(dipping.

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Presentation on theme: "Albumin Analysis by Potentiometric Method. situation Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) 0 ppm0.2530.14069.82-68.88 First 3 ppm albumin(dipping."— Presentation transcript:

1 Albumin Analysis by Potentiometric Method

2 situation Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) 0 ppm0.2530.14069.82-68.88 First 3 ppm albumin(dipping for 5min) 0.2580.14969.05-69.30 First wash0.2570.15373.65-78.40 second 3 ppm albumin(dipping for 1min) 0.2620.15369.93-73.32 second wash0.2620.15870.81-73.55 third 3 ppm albumin(dipping for30min) 0.2640.15265.50-69.23 Table Ⅳ : The peak current reproduciblity of electrode treated by traditional method

3 Fig 6. The cyclic voltammogram of Au wire electrode WE: Au wire, WE area: 0.0113 cm 2, RE: Ag/AgCl(0.5M), CE: Pt, Electrolyte: 0.5 M KCl 50 ml(20 mM K 4 Fe(CN) 6 +20 mM K 3 Fe(CN) 6 ), Potentiostat: CHI-405, Scan range: -0.2~0.6 V, scan rate: 0.05 V/sec

4 Table Ⅴ : The peak current reproduciblity of electrode treated by traditional method situation Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) 0 ppm0.2580.13565.84-64.94 First 3 ppm albumin(dipping for 10min) 0.2600.12863.78-54.03 First wash0.2850.12253.14-59.71 second 3 ppm albumin(dipping for 3min) 0.2720.11055.15-47.61 second wash0.2820.13254.25-55.33 third 3 ppm albumin(dipping for 1hr) 0.2940.09643.41-40.37

5 Fig 7. The cyclic voltammogram of Au wire electrode WE: Au wire, WE area: 0.0113 cm 2, RE: Ag/AgCl(0.5M), CE: Pt, Electrolyte: wash soiution, Potentiostat: CHI-405, Scan range: -0.2~0.6 V, scan rate: 0.05 V/sec

6 Fig 8. The cyclic voltammogram of Au wire electrode WE: Au wire, WE area: 0.0113 cm 2, RE: Ag/AgCl(0.5M), CE: Pt, Electrolyte: 0.5 M KCl 50 ml(20 mM K 4 Fe(CN) 6 +20 mM K 3 Fe(CN) 6 ), Potentiostat: CHI-405, Scan range: -0.2~0.6 V, scan rate: 0.05 V/sec, Wash method: 10min.1N NaOH+10min. 1N HCl+10min.1N HNO 3

7 situation Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) 0ppm0.2620.15162.66-64.42 Dip 3ppm albumin for 5min. 0.2860.12843.53-47.47 #1 after wash0.3090.11131.73-35.44 Dip 3ppm albumin for 10min. 0.4350.05420.01-23.87 #2 after wash0.2900.13739.99-42.72 Dip 3ppm albumin for 30min. 0.3440.10223.41-26.21 #3 after wash0.2910.14345.74-48.81 Dip 3ppm albumin for 1hr. 0.2770.13537.57-37.86 Table Ⅵ : The peak current reproduciblity of electrode treated by traditional method

8 Fig 3. The cyclic voltammogram of selectivity WE: Au wire, WE area: 0.0113 cm 2, RE: Ag/AgCl(0.5M), CE: Pt, Electrolyte: 0.5 M KCl 50 ml(20 mM K 4 Fe(CN) 6 +20 mM K 3 Fe(CN) 6 ), Potentiostat: CHI-405, Scan range: -0.2~0.6 V, scan rate: 0.05 V/sec

9 Ep a Ep c Ip a Ip c (V vs. Ag/AgCl(0.5MKCl)) (  A) blank0.2530.174106.30-105.20 Mixture(including 3ppm albumin) 0.2640.157 93.49- 95.50 Table Ⅱ : The peak current of selectivity

10 Fig 9. The cyclic voltammogram of Au wire electrode WE: Au wire, WE area: 0.0113 cm 2, RE: Ag/AgCl(0.5M), CE: Pt, Electrolyte: wash solution, Potentiostat: CHI-405, Scan range: -0.2~0.6 V, scan rate: 0.05 V/sec, wash method: 3min. Boiling water+1min.ultrasonic

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