| abstract |
A container used for chromatographic sample analysis has (a) at least one silica uppermost layer, which is deposited onto the container using a liquid phase deposition process, and, optionally, (b) at least one indicator present in at least part of the at least one silica uppermost layer for visually distinguishing the container from other containers, and/or determining the "use status" of the container, and/or identifying the proper orientation of the container when it is to be put in use, and/or providing a means of decoration, identification, or counterfeit detection. In one preferred embodiment, the indicator is thermochromic. In another preferred embodiment, the indicator is photochromic. |