Cadmium-copper reduction column reduction degree determination method for water body nitrate
A determination method and nitrate technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to calculate the slope of the standard curve
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[0018] The present invention will be further illustrated below by specific examples.
[0019] 1. Determination steps
[0020] Pipette a certain amount of nitrate and nitrite standard solution into a 25ml colorimetric tube, add nitrogen-free redistilled water to dilute to 10ml, add 10ml ammonium chloride buffer, shake well, and make the concentration 0, 5.0 , 10.0, 15.0, 20.0, 25.0mol / L standard series. The reducing column is activated and cleaned according to standard methods.
[0021] The multi-channel continuous flow automatic chemical analyzer first uses the nitrite analysis module to analyze the nitrite standard series; then uses the nitrate analysis module to analyze the nitrate standard series; finally uses the nitrate analysis module to analyze the nitrite standard series.
[0022] The only difference between the nitrate analysis module and the nitrite analysis module is that the nitrate analysis module has a cadmium-copper reduction column while the nitrite analysis ...
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