1. The dilution effect of English blue
When the sample concentration is too high, we can dilute the sample and then pass it through an ultrafiltration unit or dialysis unit. In fact, this dilution step can also be completed by Yinglan technology.
On the other hand, for samples with significant changes in measured data, it is also difficult to organize experiments. For example, for a batch of samples, the concentration difference of the tested ions is huge, and the data points may not fall on the standard curve. If human judgment is used to dilute each sample by different multiples, it will face a lot of manual labor and on duty judgment, and the automatic sampler will be useless.
In addition, if dilution is done manually, volumetric flasks are often needed, and it is very difficult to clean them thoroughly. A slight mistake can cause contamination. Many solutions use peristaltic pumps on automatic samplers to achieve dilution, that is, adding a certain amount of solvent to each sample grade; Alternatively, a buffer unit can be added between the automatic sampler and the chromatograph, and the sample and solvent can be separately added to the buffer unit using a peristaltic pump to achieve dilution. The dilution achieved through peristaltic pumps often lacks precision and requires the integration of multiple peristaltic pumps into an automatic sampler for separate control. The pipeline is complex and difficult to clean, thus limiting its application range.
The dilution of English blue adopts a different method, and the addition process of English blue dilution is not completed through a peristaltic pump, but through a specialized Dosino addition unit. The Dosino dosing unit can be seen as a fixed, multi-channel, continuous flow, and cross contamination free precision mixer, with an accuracy of up to one ten thousandth of the pipetting volume. It is with the help of Dosino that the dilution process is more accurate and error free.