|
| Determination of Acetic Acid Content in Vinegar by pH Electrode and Flow Injection Analysis |
| |
| View Full Text Download reader |
| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:pH electrode flow injection analysis titration acetic acid |
| Author | Institution |
| 张伯先，康秀英，孙杨，宋启军 |
江南大学化学材料与工程学院 |
|
| Hits: 2307 |
| Download times: 993 |
| Abstract: |
| A new flow injection analysis（FIA） system with a flat pH electrode was established for the rapid determination of acetic acid in vinegar.The FIA system was optimized by alteration of injection volume，flow rate，carrier concentration and length of reaction tubes.With sodium hydroxide solution as carrier stream，the peak area obtained from the lab assembled FIA system were proportional to the logarithm concentration of acetic acid in the range of 4639×10-4-0212 mol?L-1.The method was applied in the detection of acetic acid in four vinegar samples，and the results obtained were in good agreement with those obtained by the standard manual titration method.The sensitivity of this method was ten times higher than that of the conventional titration method，and the analysis rate was up to 60 samples per hour.By changing the concentration of carrier stream（sodium hydroxide），the acetic acids at different concentration levels can be titrated without any other adjustments to the FIA system. |
| Close |