Anders G
Environ Qual Saf Suppl. 1975;4:104-10.
The quantitative direct determination of fluorescent whitening agents (FWAs) by thin layer chromatography involves limits of detection of 0.001 to 0.0005 mug. Visual assessment is about ten to a hundred times less sensitive than photometric measurement on thin layer chromatograms. The standard deviations in 10 measurements of two substances with different degrees of light sensitivity for a single measurement with a limit of detection of the order of 0.005 mug were about +/-13% to 44%. In the higher concentrations normally used (0.5 mug), the standard deviations were only +/-5% for both substances.
通过薄层色谱法定量直接测定荧光增白剂（FWA）的检测限为0.001至0.0005微克。目视评估的灵敏度比薄层色谱图的光度测量低约10至100倍。对于检测限约为0.005微克的单次测量，对两种具有不同光敏感度的物质进行10次测量的标准偏差约为±13%至44%。在通常使用的较高浓度（0.5微克）下，两种物质的标准偏差仅为±5%。
