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首页> 美国政府科技报告 >Intercomparison of methods for the determination of mercury deposition to convention waters. Report prepared for the Paris Commission
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Intercomparison of methods for the determination of mercury deposition to convention waters. Report prepared for the Paris Commission

机译：常规水中汞沉积测定方法的比对。为巴黎委员会编写的报告

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In this report, results from the intercomparison of collection and analytical methods for the determination of atmospheric mercury deposition to European marginal seas, are given. The intercomparison exercise consisted of four separate parts, to be able to separate influences from the methods of collection from effects associated with the analytical techniques. Six laboratories reported data in the analytical part of the intercomparison exercise, in which determined mercury levels in two precipitation samples were compared. The remaining exercises of the intercomparison were performed as parts of a field study at the Swedish PARCOM/EMEP station Roervik, during May to October 1991. Precipitation samples were collected by the different equipments used in the four various countries, who participated in this part of the intercomparison. A comparison of the deposition estimates, based on the different collection and analytical methods applied by the various laboratories, showed that the flux may vary by approximately a factor of two to four. The reason seems to be a combination of several severe systematic errors, besides random errors. The implication is that more or less incomparable data form the basis for todays estimates of the atmospheric mercury load to marginal sea areas. However, considering the outcome of the various parts of the present intercomparison, there are obvious possibilities to improve the accuracy of this data base.

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