ST106K2 Soil Cation Exchange Capacity Detection System Introduction: The measurement of soil cation exchange capacity refers to the total amount of soil cation exchange capacity (CEc refers to the various cations that can be adsorbed by soil colloids). Acid and neutral soils are usually determined by the traditional Ammonium acetate exchange method, and the soil is repeatedly treated with Ammonium acetate solution to make the soil become ammonium ion saturated soil; After washing off the surplus Ammonium acetate with ethanol, the amount of ammonium ion shall be determined by distillation method and converted into soil cation exchange capacity. Common determination methods of soil cation exchange capacity include: acetic acid exchange method for acid and neutral soil, and ammonium chloride Ammonium acetate exchange method for calcareous soil. The advantage of measuring soil exchange capacity by acetic acid exchange method is that when acetic acid acts with base unsaturated Tucheng, it releases weak acid, which will not damage the soil absorption complex. Ammonium acetate has strong buffer, and the pH value of solutions exchanged successively is almost unchanged. If it is necessary to determine the composition of exchangeable cations in the solution, the excess acetic acid is also easy to be burned and decomposed. Therefore, this method is widely used at home and abroad at present. According to the current standards of "LY/T 1243-1999 Determination of Cation Exchange Capacity in Forest Soils" and "NY/T295-1995 Determination of Cation Exchange Capacity and Exchangeable Base in Neutral Soils", our company has developed this ST106K2 series soil cation exchange capacity detection analyzer. Technical features: 1. ST106K2-1 solid-liquid separation module (centrifugal oscillator) Capable of processing 36 samples, with automatic reagent addition, robotic arm automatic bottle cap tightening, automatic reagent addition, and automatic supernatant pouring functions; And a strong oscillation function is set to ensure uniform mixing of soil samples; Adopting a multi-station centrifuge, the centrifuge's centrifugal time and speed can be adjusted; The oscillation part adopts a multi group combined rotating mixing rotary table with adjustable speed, which can alternately operate to process samples; 2. ST106K2-2 Distillation Titration Module According to standard requirements, the instrument is equipped with a built-in water vapor generator that can automatically heat the sample with water vapor; Six samples can be heated and distilled at once, and the heating zone can provide heating and insulation function; The instrument can automatically set the distillation endpoint and stop heating, and the receiving end is designed with a magnetic stirring function; The endpoint recognition uses visual sensors higher than human eye devices, which can efficiently identify the titration endpoint.
Introduction: The measurement of soil cation exchange capacity refers to the total amount of soil cation exchange capacity (CEc refers to the various cations that can be adsorbed by soil colloids). Acid and neutral soils are usually determined by the traditional Ammonium acetate exchange method, and the soil is repeatedly treated with Ammonium acetate solution to make the soil become ammonium ion saturated soil; After washing off the surplus Ammonium acetate with ethanol, the amount of ammonium ion shall be determined by distillation method and converted into soil cation exchange capacity. Common determination methods of soil cation exchange capacity include: acetic acid exchange method for acid and neutral soil, and ammonium chloride Ammonium acetate exchange method for calcareous soil. The advantage of measuring soil exchange capacity by acetic acid exchange method is that when acetic acid acts with base unsaturated Tucheng, it releases weak acid, which will not damage the soil absorption complex. Ammonium acetate has strong buffer, and the pH value of solutions exchanged successively is almost unchanged. If it is necessary to determine the composition of exchangeable cations in the solution, the excess acetic acid is also easy to be burned and decomposed. Therefore, this method is widely used at home and abroad at present. According to the current standards of "LY/T 1243-1999 Determination of Cation Exchange Capacity in Forest Soils" and "NY/T295-1995 Determination of Cation Exchange Capacity and Exchangeable Base in Neutral Soils", our company has developed this ST106K2 series soil cation exchange capacity detection analyzer.
