| 摘要 |
<p>PURPOSE:To prevent the use of a concentrated liquid by providing a liquid container with a member for preventing the insertion of a liquid removal instrument therein at the height of the liquid surface below a predetermined height from the inner surface of the container bottom. CONSTITUTION:A member 5 for preventing the insertion of a liquid removal instrument is placed in a liquid container 1 provided with an opening portion sealable with a lid 2 at the upper part thereof at a predetermined height from the inner surface of the bottom thereof in such manner that the removal of the liquid becomes difficult, as the liquid surface is lowered below that height. This preventive member 5 may be either a platelike or netlike material and a clearance between this member and the inner surface of wall in the liquid storing portion of the container is sufficiently large to allow the full flowing of the liquid. It is important that the material thereof be the type which does not affect the liquid composition. The preventive member is fixed at a height corresponding to that of the liquid in the minimum limit of the amount, with changes in the liquid concentration resulting from evaporation confined within a practically negligible limit. This method makes removal of the liquid impossible, when it is reduced to such an amount that changes in the liquid concentration due to the opening of the container poses a problem, thereby practically preventing the errors of analysis due to variations in the liquid concentration.</p> |
