The injection voltage was set to 10 kV for 5 s, and the separation voltage was set to 14 kV. NO3−, NH4+, H2PO4− and K+ in sample solutions could be detected in 5 min with relative standard deviations (RSDs) from 1.0 to 7.51%. Lime concretion black soil samples from a complete field were collected and detected. It separated macronutrient ions using capillary electrophoresis and then measured the ion concentration based on the C4D principle. The device consisted of a capillary channel, C4D detector, high-voltage system, etc. In this paper, a rapid detection method and device were devised, combining capillary electrophoresis (CE) and capacitively coupled contactless conductivity detection (C4D), and presented to detect macronutrient contents of soil. ![]() However, the lack of rapid precise and multi-index detection techniques for soil macronutrient contents hinders both rational fertilization and cost reduction. ![]() The acquisition of nutrient data on a precise scale has played a vital role in nutrient management processes for soils.
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