| POTENTIOMETRIC TITRATION OF CALCIUM IN SEAWATER |
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| 作者姓名： | 谢式南 纪红 吴爱琴 陈国华 |
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| 作者单位： | Department of Marine Chemistry，Qingdao Ocean University，Qingdao 266003 |
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| 摘 要： | Atpasent,thestandardmethodfordetendningcalciuminseawateriscomPlexometrictitrationusingEGTAethyleneglycol-bis(2-adrinoethylether)-N,N,N',N'-tetraaceticacid]andGHAtelyoxal-bis(2-hydroxyanil)].ThisInethodwasfirStdeveopedbyTSunogaietal.(l968),sumrnarindbyKremling,andeditalinMethodsofSeawaterAnalySisbyGrasshoff(l983).AlthoughtheendpointreadingsinthismethodarenotquitCsharp,andrnaybeaffCCtedbyoveanstweather,withtheuseofcalctumISEasindicatingeledrode,SCEasreferenceeledrodeanddigitalvoltme…
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| 收稿时间： | 22 September 1995 |
| 修稿时间： | 14 June 1996 |
Potentiometric titration of calcium in seawater |
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| Xie Shi-nan,Ji Hong,Wu Ai-qin,Chen Guo-hua.POTENTIOMETRIC TITRATION OF CALCIUM IN SEAWATER[J].Chinese Journal of Oceanology and Limnology,1997,15(1):32-35. |
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| Authors: | Xie Shi-nan Ji Hong Wu Ai-qin Chen Guo-hua |
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| Institution: | (1) Department of Marine Chemistry, Qingdao Ocean University, 266003 Qingdao |
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| Abstract: | By using calcium ion selective elatrode (Ca ISE) as indicating electrode, saturated calomel electrode (SCE) as reference electrode and EGTA as titrant, calcium in seawater was determined by potentiometric titration in borate buffer solution. This method can reduce observation errors in the determination of the endpoint, and thus provide better analytical precision(<0.08%) than present complexometric titration. |
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| Keywords: | calcium ion selective elatrode calcium seawater potentiometric titration |
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