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将分析纯物质配制成10μg/ml浓度，应用岛津UV-1601紫外分光光度计，在波长190~335nm内扫描溶液的吸收峰，结果表明，硝酸相盐物质在201nm处有一稳定的吸收峰，吸收值与浓度成良好的线性关系，相对于硝酸盐物质而言，亚硝酸钠吸收峰红移至210nm，CaSO4、SrCl2均呈现低吸收，但其吸收峰在<200nm的远紫外区，在该浓度下，NH4Cl、HCl和KCl均呈现低吸收，并集中在远紫外区，而KH2PO4和NH4F几乎没有吸收．
The analytical substance was prepared to a concentration of 10 μg / ml, and the absorption peak of the solution was scanned using a Shimadzu UV-1601 UV spectrophotometer at a wavelength of 190 to 335 nm. The results showed that the nitrate phase salt had a stable absorption peak at 201 nm, Absorption value and concentration into a good linear relationship, compared to the nitrate material, sodium nitrite absorption red-shifted to 210nm, CaSO4, SrCl2 showed low absorption, but its absorption peak in the <200nm far ultraviolet region, the Concentrations of NH4Cl, HCl and KCl showed low absorption, and concentrated in the far ultraviolet region, and KH2PO4 and NH4F almost no absorption.