Example of analysis quality improvement of liquid composition analysis device

(1) Conventionally used stainless steel needles have many small dents on the inner peripheral surface, and liquid remains in those dents and mixes with the liquid to be analyzed next, making it difficult to obtain correct analysis results.
(2) Stainless steel needles eluted metal components into the liquid to be analyzed, and due to this elution, accurate analysis results of the liquid to be analyzed could not be obtained.

The material of the needle has been changed from conventional stainless steel to Fine Ceramics (zirconia) with excellent surface smoothness and chemical resistance.
* Depending on the type of liquid, even ceramics may have low chemical resistance.
*Values ​​are representative values ​​based on in-house measurements at the time of shipment.
Surface roughness of inner surface: Ra0.1 μm or less

By using ceramics (zirconia) with excellent surface finish, the needle has a smooth surface on both the inner and outer diameters. As a result, it was possible to reduce the influence of residual liquid mixing during the analysis to follow. In addition, due to the improved chemical resistance, there is no elution of metal components from the needle, making it possible to obtain more accurate analysis results.