In most cases the correct estimation of the systematic error of analytical chemistry methods is complicated by the random error, conditioned by irreproducibility of some experimental factors. In stripping voltammetry the appreciable systematic error connected with the residual current (base line) subtraction can appear. The stripping voltammetry feature is absence of information about the base line shape under the peak. The modelling of analytical signal with the addition of the experimental base line for the systematic error estimation of mercury determination by stripping voltammetry with gold-film electrode in the environmental objects are proposed. The systematic error dependences on the relative magnitude of analytical signal of mercury were obtained. The proposed procedure of systematic error compensation allows to reduce the summary error of stripping voltammetry mercury determination in the environmental objects (water samples).Kevwords: stripping voltammetry, analytical signals modelling, systematic error, mercury determination, environmental objects, gold-film electrode.In most cases the correct estimation of the systematic error of analytical chemistry methods is complicated by the random error, conditioned by irreproducibility of some experimental factors.The traditional statistical procedures of systematic error estimation require a plenty of experimental measurements and are processed on some a priori knowledge of these errors which can get, for example, at calibration testing.One of most effective ways of systematic error detection in a number of research results is plotting the diagram of a values sequence of random deviations of results from average [l]. However, this procedure is qualitative and can only get the information of systematic error presence and allow to determine the order of magnitude. 0-7803-7008-2/01/$10.00 02001 IEEEIn stripping voltammetry the appreciable systematic error is conditioned by the residual current (base line) subtraction can appear. The stripping voltammetry feature is absence of information about the base line shape of the peak. The absence of the information of true signal height makes the standard samples application impossible. This is due to the irreproducibility of properties and an electrode surface.The application of analytical signals modelling for systematic error estimation at various ways of analytical peaks processing using a real residual current is shown in paper [2]. The systematic error estimation of a standard additions method at the linear approximation of a base line in mercury determination by stripping voltammetry on a gold-film electrode was processed on a procedure offered in paper [2]. The shape of peak got on a technique [3] for a non-additive analytical series of mercury with the linear potential sweep was approximated applying the modified biGaussian hnction MPGl for a non-additive series of analytical signals [4]:OS)t&h(kp)) aoxm = 0.64998;~,,~ = -0.003341; uoD = 0.O73182;alD = 0.0016713; a,, = 0.459126;aI, = 0.0092848; u2, = -0.00086 1 ...
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