Ammonia nitrogen analysis method applicable to detection of samples in multiple fields
An analysis method and sample technology, which can be used in the analysis of materials, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. Wide and other problems, to achieve the effect of convenient operation, simple instrument structure and small volume
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Embodiment 1
[0028] This embodiment provides an ammonia nitrogen analysis method suitable for multi-field sample detection. The ammonia nitrogen analysis method includes the following steps:
[0029] (A1) Place the sample to be tested in the sample sampling device, the control system controls the automatic sampling of the sample to be tested, the quantitative module switches to the quantitative state and switches to the corresponding quantitative volume for quantification according to the sample to be tested; The test samples are ammonia nitrogen sample solutions in different fields;
[0030] (A2) The switching module is switched according to the sample to be tested, so that the dialysis module is selectively connected to the analysis channel; the analysis channel includes a reaction system and a detection system, and there is only one analysis channel;
[0031] (A3) The control system controls the quantitative module to switch to the sample injection state. The quantitative volume of the ...
Embodiment 2
[0051] An application example of the ammonia nitrogen analysis method in Example 1 of the present invention in the field of nitrogen analysis in water, soil and fertilizer.
[0052] In this application example, the nitrogen content in water, soil and fertilizer can be obtained by one-time start-up detection. Therefore, soil samples and fertilizer samples need to be pretreated to obtain a sample solution in the form of ammonia nitrogen. The specific pretreatment method is as follows :
[0053] 1. Pretreatment of soil samples
[0054](1) Treatment of soil samples excluding nitrate nitrogen and nitrite nitrogen: Accurately weigh 1.0000g of soil sample (through a 0.149mm sieve), transfer it into the digestion tube, do not stick the sample to the tube wall, try to keep the sample Put it at the bottom of the digestive tube, moisten it with 0.5ml-1ml deionized water, add 1.85g accelerator, then add 5ml concentrated sulfuric acid, digest at 200°C for 1 hour, then raise the temperatur...
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