Application of Optical Coatings in Automotive Industry

From a production viewpoint , the optical thin films used to transparent substrates such as window glass for automobiles and the coating treatment process are reviewed. The state of the ar t of the technologies, and the problems to be solved and possible solutions ar e discussed. Market trends are forecasted.

液相色谱-串联质谱法测定化妆品中尿囊素、烟酸和烟酰胺的含量

建立了液相色谱-串联质谱法同时检测化妆品中尿囊素、烟酸和烟酰胺的含量。样品采用水超声提取,经ODS-SP C_(18)(100 mm×2.1 mm,3μm)色谱柱分离,以0.1%乙酸水溶液(A)-0.1%乙酸甲醇(B)为流动相,梯度洗脱,流速为0.3 mL/min,柱温35℃,进样体积1μL,电喷雾电离(ESI),正离子扫描,多反应监测(MRM)模式测定。结果表明,尿囊素、烟酸和烟酰胺的分离度良好,在各自浓度范围内线性关系良好,r>0.99,方法最低定量限(LOQ)1~5μg/g,最低检测限(LOD)0.3~1.5μg/g,精密度、重复性、稳定性RSD均小于10%,加样回收率在94.55%~104.42%,13批次样品的检测结果与标签标注不一致。该方法快速简便、快捷、灵敏度高、专属性强、重复性好,可用于化妆品中尿囊素、烟酸和烟酰胺的定量分析。