In daily water quality testing, we can indirectly determine the content of sulfide in water by interacting with iodine under acidic conditions, and we can also determine the sulfide in water by gas phase molecular absorption spectroscopy. However, no matt

1. Problems that need to be paid attention to when collecting water samples The water samples should be collected in glass bottles or polyethylene bottles. The measurement should be carried out immediately after sampling. If the detection cannot be perfo

Zinc reagent spectroscopy is suitable for boiler water, feed water, boiler water and other water samples with a copper ion content of 2.5-50ug/L. The principle is to dissolve all the copper in the tested water sample into an ion state, and then at pH 3.5

We have already talked about the operation method and principle of sodium azide correction method to detect dissolved oxygen in water. This method can eliminate the interference of nitrite in water during detection, and can accurately determine the parame

The acid potassium permanganate method is suitable for the determination of chemical oxygen demand (COD) in industrial circulating cooling water, and its measurement range is 2-80mg/L. The principle used in this method is that potassium permanganate exhib

Iodometric method is suitable for daily water and wastewater with sulfide content above 0.40mg/L. The principle is that sulfide reacts with excess iodine under acidic conditions, and the remaining iodine is titrated with sodium thiosulfate, which is deter

Sulfate in water is a common substance, which is widely present in various natural water bodies. It is mainly formed by slowly permeating formation minerals into the groundwater. Therefore, the concentration of sulfate in the water quality of different en

The measurement range of silicate detector is generally 0-50ug/L, and the basic error is 5% of full scale 50ug/L. The principle is to reduce the yellow complex formed by soluble silicon and ammonium molybdate The agent reduces it to silicomolybdenum blue,

Problems that need to be paid attention to when processing potassium ion water samples1. The sample should be analyzed as soon as possible after collection, otherwise it will be adsorbed on the container wall and the final measurement result of the water

There are many factors that can affect the final result in water quality testing, but in general, it can be divided into two types: water sample processing and operation. If you do not pay attention to these two aspects in daily testing, problems are pron