Non-specific reaction inhibitor, method for using non-specific reaction inhibitor, method for inhibiting non-specific reaction, biochemical measurement reagent, specimen pretreatment solution, and biochemical measurement reagent kit

A method for inhibiting a non-specific reaction, the method comprising:

• inhibiting a non-specific reaction when measuring a measurement target substance contained in a biological sample by mixing a copolymer comprising a constitutional unit A derived from 2-methacryloyloxyethyl phosphorylcholine and exhibiting the following physical property X, with the biological sample,
• <physical property X>
• in a spectrum of Fourier transform infrared spectroscopy according to an attenuated total reflection method (ATR method), there is a peak having a maximum absorption at 2870 to 2833 cm−1.

A biochemical measurement reagent, which is a reagent used for biochemical measurement,

• wherein the reagent contains a copolymer comprising a constitutional unit A derived from 2-methacryloyloxyethyl phosphorylcholine and exhibiting the following physical property X,
• <physical property X>
• in a spectrum of Fourier transform infrared spectroscopy according to an attenuated total reflection method (ATR method), there is a peak having a maximum absorption at 2870 to 2833 cm−1.

A specimen pretreatment solution, which is a reagent used for biochemical measurement,

• wherein the reagent contains a copolymer comprising a constitutional unit A derived from 2-methacryloyloxyethyl phosphorylcholine and exhibiting the following physical property X, and a liquid medium in which the copolymer is dissolved or dispersed,
• <physical property X>
• in a spectrum of Fourier transform infrared spectroscopy according to an attenuated total reflection method (ATR method), there is a peak having a maximum absorption at 2870 to 2833 cm−1.