Method for synchronously measuring iodinated byproducts in water under high-salt background

The invention belongs to the technical field of environmental engineering and municipal water supply and drainage, and particularly relates to a method for synchronously measuring iodinated byproducts in water under a high-salt background. Comprising the following steps: water contains a plurality of iodinated byproducts and chloride ions with the concentration not lower than 1000mg/L; the method comprises the following steps: carrying out chloride ion precipitation treatment on water to be detected by adopting at least one precipitator comprising bismuth oxide and bismuth hydroxide to obtain dechlorinated water; extracting an organic phase from the dechlorinated water by adopting an organic extracting agent; detecting to obtain response values of various iodinated by-products in the water to be detected at the same time; and calculating the concentration of the iodinated by-product in the to-be-detected water according to the standard curve of the iodinated by-product and the response value of the iodinated