The Systematic Error in Photometric Set-point Titrations of Submicromolar Amounts of Calcium and Zinc
نویسندگان
چکیده
Although reproducible results can be obtained in photometric set-point titrations of submicromolar amounts (5 -lo+ M and higher) of calcium(I1) and zinc(I1) by using an ? automatic titrator, the systematic error can be considerable. This error is partly intrinsic ; in nature, but there is an additional error caused by dilution in successive titrations_ Accurate values can be obtained only when standardization and actual titrations are performed under the same conditions of dilution, set-point, indicator concentrations, etc.
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