Method for determining content of lithium hexafluorophosphate in lithium ion battery electrolyte through ultraviolet spectrophotometer

The invention discloses a method for determining the content of lithium hexafluorophosphate in lithium ion battery electrolyte through an ultraviolet spectrophotometer. The method specifically comprises the following steps: dissolving the lithium ion battery electrolyte, then detecting the dissolved sample by adopting a phosphorus vanadium molybdate yellow colorimetric method through the ultraviolet spectrophotometer, and determining the mass concentration of phosphate radical in the dissolved sample, to obtain the content of lithium hexafluorophosphate in lithium ion battery electrolyte. The invention aims at providing a simple and convenient determination method for the content of lithium hexafluorophosphate in lithium ion battery electrolyte. The method does not need expensive instruments, the detection cost is low and the detection precision is high, and the repeatability is excellent. 本发明公开了种紫外分光光度计测定锂离子电池电解液中六氟磷酸锂含量的方法，所述的方法具体为：将锂离子电池电解液消解后用紫外分光光度计进行磷钒钼黄比色法对消解后的样品进行检测，测定消解后的样品的磷酸根的质量浓度进而得到锂离子电池电解液中六氟磷酸锂