Riedhammer T M
J Assoc Off Anal Chem. 1979 Jan;62(1):52-5.
A rapid colorimetric method is presented for the quantitative determination of poly(N-vinyl-2-pyrrolidone) in contact lens solutions. The method is simple, requires no sample pretreatment, and uses only a small volume of sample. The procedure is based on the measurement of the net absorbance of a poly(N-vinyl-2-pyrrolidone)- Congo red complex at 545 nm. An accuracy of greater than +/- 4% was obtained for the concetnration ranges usually found in contact lens solutions with a minimum detection level of 10 ppm. The method is useful as a screening procedure for solutions of unknown composition and as a quality assurance procedure for routine determinations.
本文介绍了一种快速比色法，用于定量测定隐形眼镜护理液中的聚（N-乙烯基-2-吡咯烷酮）。该方法简单，无需样品预处理，且仅需使用少量样品。该程序基于在545nm处测量聚（N-乙烯基-2-吡咯烷酮）-刚果红复合物的净吸光度。对于隐形眼镜护理液中通常发现的浓度范围，获得了大于+/-4%的准确度，最低检测水平为10ppm。该方法可作为未知成分溶液的筛选程序以及常规测定的质量保证程序。
