Cystatin C adsorption inhibitor
Disclosed is a method by which the adsorption of cystatin C to a container can be inhibited in a simple manner to improve the accuracy of the measurement of cystatin C. Provided are: a cystatin C adsorption inhibitor comprising a non-ionic surfactant; a cystatin C measurement reagent comprising the adsorption inhibitor; and a cystatin C measurement kit. Also provided is a method of inhibiting the adsorption of cystatin C, the method comprising bringing a cystatin C-containing sample into contact with a measurement instrument in the presence of a non-ionic surfactant. The aforementioned non-ionic surfactant is preferably a polyoxyethylene-type surfactant. Alternatively, the aforementioned non-ionic surfactant has preferably a phenoxy structure, more preferably a benzylphenoxy structure.
1. A method of improving the measurement of cystatin C in a sample, said method comprising:
inhibiting the adsorption of cystatin C to a measurement instrument comprising bringing a cystatin C-containing sample into contact with the measurement instrument in the presence of a non-ionic surfactant, wherein said non-ionic surfactant is selected from the group consisting of polyoxyethylene distyrenated phenylether, and polyoxyethylene tribenzylphenylether and
measuring the amount of cystatin C in the sample.
2. The method of measuring according to claim 1 , wherein said non-ionic surfactant is present in an amount of 0.001 to 10 w/v %.
3. The method of measuring according to claim 2 , wherein said non-ionic surfactant is present in an amount of 0.01 to 5 w/v %.
4. The method of measuring according to claim 1 , wherein said measurement instrument is a plastic container.
5. The method of measuring according to claim 1 , wherein said method is carried out by an immunoassay.