In many cases, the collected samples have differences in pH, which requires the tester to spend a lot of time adjusting their pH value to the standard state. It is difficult to complete the tedious and tedious task of adjusting pH value in a short period of time in routine experiments. And when it comes to measuring ions in matrices such as caustic soda, ammonia water, boric acid, etc., this problem arises.

1. The purpose of neutralization in English blue matrix:
The English blue matrix neutralization technology is an online neutralization treatment technique. Due to the use of ion exchange to neutralize the substrate, the parallelism of the experiment can be well guaranteed. Even if the substrate is strong acid or strong alkali, continuous direct injection analysis can be achieved using a robotic sample processor.

2. Construction of neutralization module in English blue matrix
The neutralization module of the English blue matrix consists of three parallel neutralization chambers. When processing acidic matrix samples, the neutralization chamber contains saturated Li⁺Or Na⁺H+in the matrix can be exchanged for Li⁺Or Na⁺When increasing the pH of the sample and processing alkaline matrix samples, the neutralization chamber is saturated with H⁺Neutralize with OH in the sample matrix and generate H₂O， Reduce the pH of the sample.
The purpose of using three parallel neutralization chambers is to have them work alternately, with one neutralization chamber rotating for each sample processed. During the neutralization process of the matrix, one of the three neutralization chambers is in operation, the second is in regeneration, and the third is in flushing to ensure the continuity of the neutralization chamber capacity and sample processing; The regenerated liquids in the neutralization chamber are LiOH/NaOH and HClO, respectively₄.

3. Application examples of neutralization in English blue matrix
Measure anions in 30% NaOH solution
As shown in the figure, the blue image is the spectrum of direct injection without neutralization in the matrix. Due to the interference of high concentration NaOH, except for a large negative peak, almost all useful signals are masked.
The red graph shows the spectrum of the sample after neutralization in the English blue matrix. The baseline is stable, and all ions can accurately peak, and it can be fully automated for continuous injection analysis.