本文主要目的是考察测定硅含量的硅钼蓝分光光度法是否可在三次采油试验研究中使用。考察了一些金属离子、酸根离子及化学剂对测定硅的影响。样品中所含少量 Ca~(2+)、Mg~(2+)、SO_4~(2-)、CO_3~(2-)、Cl~-等离子,聚丙烯酰胺和阴离子表面活性剂对硅测定无影响。含量较高时,它们的吸光度与硅的吸光度具有加和性。本法的准确度和精密度均小于2%。 The main purpose of this paper is to investigate whether silicon molybdenum blue spectrophotometry for the determination of silicon content can be used in the tertiary recovery experiments. The effects of some metal ions, acid ions and chemicals on the determination of silicon were investigated. Small amount of Ca2 +, Mg2 +, SO4-, CO3-, Cl ~ -Plasm, polyacrylamide and anionic surfactants contained in the sample were not detected on silicon influences. At higher levels, their absorbance is additive with the absorbance of silicon. The accuracy and precision of this law are less than 2%.