Perchlorate detection method

Abstract

The invention relates to a perchlorate detection method which comprises the following steps: step 1, diluting into perchlorate solutions with different concentrations by a concentration adjusting device, sequentially extracting the perchlorate solutions into an ion chromatograph, and obtaining preset instrument conditions of the ion chromatograph through multiple experimental data; step 2, adjusting conditions of an ion chromatograph to be preset instrument conditions, obtaining perchlorate standard solutions with different concentrations through dilution of a concentration adjusting device, extraction, conducting sample introduction and testing in sequence, and determining the value of the highest point of a standard curve to be 0.100 mg / L; and step 3, diluting the perchlorate into standard series solutions with required concentrations through a concentration adjusting device, and sequentially extracting the solutions according to the sequence of the concentrations from low to high. The method has the beneficial effects that the measured concentration of the perchlorate sample is more accurate, and the optimal use condition of the ion chromatograph is measured according to different conditions.

Description

technical field [0001] The invention relates to the technical field of perchlorate, in particular to a method for detecting perchlorate. Background technique [0002] Perchlorate is an inorganic pollutant. Due to its extremely stable physical and chemical properties, high water solubility, fast diffusion speed, and refractory degradation, most soil minerals have little adsorption on it, so it is present in surface water or groundwater systems. Continuous migration can easily cause water source and drinking water pollution, and it is a class of persistent environmental pollutants. Perchlorate and iodide ions have similar charges and ionic radii, and can compete with iodide ions to enter the human thyroid gland, causing a decrease in the production of thyroid hormones, thereby affecting the development of brain tissue and endangering human health, especially in pregnant women and embryos. , Babies are the most vulnerable. The problem of perchlorate toxicity and environmental...

AI Technical Summary

Problems solved by technology

The problem of perchlorate toxicity and environmental pollution has aroused great concern. The current domestic drinking water hygiene standard (GB5749-2006) does not have a standard limit for perchlorate, and there is no detailed data reflecting perchlorate in China. pollution status

[0003] In the prior art, most perchlorate detection methods are not accurate enough. Therefore, an efficient and sensitive perchlorate detection method is of great significance for the monitoring of perchlorate in drinking water and understanding the pollution status of water environment in various places.

Images