The Technicon AutoAnalyzer II (AAII) is used routinely by many laboratories for determination of NO3‐N in water. The methodology involves the use of a packed‐Cd column for reduction of NO3‐N to NO2‐N, which subsequently is determined colorimetrically. A newer instrument, the Technicon TRAACS 800, uses a hollow‐Cd coil for NO3 ‐N reduction. A method is described for adapting the hollow‐Cd coil to the AAII for determination of NO3‐N in water samples. This adaptation was found to increase throughput rate and to decrease the time required for column preparation.
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Elliott et al. (1989) studied this question.
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