The experiment used ion chromatography to determine the iodine ion content in groundwater samples from a high iodine area. This method is convenient, feasible, and the data is relatively reliable. Test data: Iodine ion concentration 0.176mg/L.

Reservoir water is an important reserve of surface freshwater resources and plays a crucial regulatory role in alleviating the shortage of urban freshwater resources. Therefore, the detection of reservoir water quality is also an important task carried out by environmental protection departments, water resources departments, and disease control departments. In this experiment, ion chromatography was used to determine the anion content in the water sample of Chengzhi Reservoir. The sample was directly injected after filtration through a 0.45um membrane. This method is convenient, feasible, and has high credibility.

The oxygen bomb combustion method is suitable for determining oxidizable substances such as halogens in organic matter. For sulfur detection, an oxygen bomb device is used to add excess high-pressure oxygen to oxidize sulfur into SO3, and then a washing solution is used as the absorbing solution. SO3 is fully dissolved to form SO42- before detection.

Sample pretreatment: Accurately weigh 2.0000g of solid zirconium carbonate powder and place it in a 500ml beaker. Slowly add 8ml of nitric acid solution with a mass concentration of 65% -68%, stir with a glass rod until the solid is fully dissolved and the solution is clear and transparent. Titrate with a prepared saturated potassium hydroxide solution until the solution becomes neutral, and a white flocculent precipitate appears in the solution. Drain with a glass rod, pour the product from the beaker into the XZ-1 vacuum pump, clean three times, filter, and dilute the solution in the conical flask to 1000ml by 2.5 times before testing.