Apparatus for eliminating halide ions from aqueous solutions and method to remove halide ions from liquid aqueous samples

A method of removing halide ions from aqueous solutions using an apparatus having a hollow cylindrical sample holding chamber, with a front end and an open rear end, the front end has an orifice;

• and in the vicinity of which is disposed a filter plate that extends over the cross section of the sample holding chamber and is liquid-permeable and essentially impermeable for solids and is inserted in a fixed manner into the hollow cylindrical sample holding chamber;
• a plunger which can move to and fro in the sample holding chamber and having a plunger stem which engages in the open rear end of the sample holding chamber, and, in the sample holding chamber between the filter plate and the plunger is disposed a bed of a charged finely divided particulate adsorbent which particles are freely movable with respect to one another within the sample holding chamber, the adsorbent reacting with halide ions forming a sparingly soluble compound, which bed fills a part of the sample holding chamber by the steps:
• drawing in a water sample through the orifice at the front end of the sample holding chamber into said chamber by moving the plunger towards the rear end of the sample holding chamber, contacting the water sample with the bed of the charged adsorbent present in the sample holding chamber by mixing the water sample with the adsorbent and precipitating the halide ions as a sparingly soluble halide compound and expelling the sample essentially free of halide ions from the apparatus by moving the plunger into the sample holding chamber, wherein the precipitated compound is reliably retained by the filter plate.