| 摘要 |
FIELD: medicine; chemical engineering. ^ SUBSTANCE: method involves adding 5 mole/l tartaric acid solution of pH=3.0 to bisubstituted 0.01 mole/l ammonium hydrophosphate solution. The solution is deaerated with oxygen concentration being less than 0.001% during 30 s at (-1.5) V. Electrolysis is carried out during 330 s at (-1.5) V. Gas supply is stopped and current-voltage curve is recorded at voltage scanning rate of 300 mV/s. Standard angiotensin II solution is added, stirred and electrochemical concentrating on is carried out on glass-graphite electrode during 330 s at (-1.5) V. Gas supply is stopped and current-voltage curve is recorded at voltage scanning rate of 300 mV/s. Analytical signal of angiotensin II concentration in potential range of 0.3-0.5 V relative to chlorine-silver electrode. ^ EFFECT: improved sensitivity and express-analysis features. ^ 4 tbl |
