Soil automatic analyzer and method for determining trace elements in soil by using the analyzer

Abstract

The invention provides an automatic soil analyzer and a method for measuring trace elements in soil, wherein the automatic soil analyzer comprises a sampler, a first peristaltic pump, a first multiport valve, a first sampling ring, a first knotted reactor, a second knotted reactor, a first heating device, a first flow tank, a first detector, a first three-way valve and a second three-way valve; a first sampling needle of the sampler is connected with the F port of the first multiport valve; the two ends of the first sampling ring are respectively connected with the B port and the E port of the first multiport valve; the D port of the first multiport valve is connected to current-carrying solution; another port of the first three-way valve is connected to ascorbic acid solution; another port of the second three-way valve is connected to ammonium molybdate colour-developing agent solution; the inlet end of the first heating device is connected to the third port of the second three-way valve; the outlet end of the first heating device is connected to the first flow tank; the first flow tank is put in the first detector; and the first detector is connected to a computer processing system. The automatic soil analyzer disclosed by the invention is rapid in measurement speed and good in accuracy.

Description

technical field [0001] The invention relates to an automatic soil analysis device and an analysis method thereof, in particular to an automatic analyzer and an analysis method for nitrogen, phosphorus and potassium content in soil. Background technique [0002] The determination and analysis of nitrogen, phosphorus, and potassium content in soil is of great significance to guide agricultural production practice, so the determination of nitrogen, phosphorus, and potassium content in soil is a must-check item for some relevant departments. At present, the determination of nitrogen, phosphorus, and potassium content in soil is mostly performed by manual methods, which are cumbersome in manual operation steps, with large human errors, poor precision, and slow test speed. In order to overcome the above problems, some nitrogen, phosphorus and potassium analyzers have been applied in China, but the degree of automation is still low, and the measurement error is relatively large. T...

AI Technical Summary

Problems solved by technology

There are some special-purpose azotometers in foreign countries with good measurement accuracy, but these instruments can only measure nitrogen content, and the test speed is slow and the price is high

Foreign nitrogen, phosphorus and potassium analyzers have a high degree of automation, high measurement accuracy, and fast measurement speed, but they are expensive, and the maintenance costs of later accessories are relatively high.

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