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首页> 外文期刊>Журнал аналитической химии >DETERMINATION OF NICOTINAMIDE (VITAMIN B_3) IN COSMETIC PRODUCTS USING DIFFERENTIAL SPECTROPHOTOMETRY AND LIQUIDCHROMATOGRAPHY (HPLC)
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DETERMINATION OF NICOTINAMIDE (VITAMIN B_3) IN COSMETIC PRODUCTS USING DIFFERENTIAL SPECTROPHOTOMETRY AND LIQUIDCHROMATOGRAPHY (HPLC)

机译：微分光度法和液相色谱法测定化妆品中的烟酰胺（维生素B_3）

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Differential spectrophotometry and liquid chromatography (TLC, HPLC) were used to qualitative and quantitative determination of nicotinamide (vitamin B_3) in commercial cosmetics creams. The liquid-liquid extraction has been used as pretreatment processes for cosmetics samples prior to their analyses. Differential spectra were collected using a UV-Vis spectrophotometer with the range of 220-350 nm, in a 1 -cm layer, with the speed of spectrum registering at 240 nm/min, the spectra width of the radiation leaving the monochro-mator of 1.00 nm and the increase in wavelength of 1 nm. The measuring methods of "peak-zero" and "peak-peak" were used. The reversed-phase determination of vitamin B_3 was conducted on a LiChrospher 100 RP-18 column (250 x 4 mm,10 um) at 260 nm, using a mixture of KH_2P0_4 (0.02 M)-methanol (9 : 1) as a mobile phase (the flow rate - 1.5 mL/min). The UV method (D2) for the determination of vitamin B_3 in cosmetic products is accurate with the comparison of reference method of HPLC.
机译：差示分光光度法和液相色谱法（TLC，HPLC）用于定性和定量测定商业美容霜中的烟酰胺（维生素B_3）。液-液萃取已被用作化妆品样品分析之前的预处理方法。使用UV-Vis分光光度计在1 cm的层中以220-350 nm的范围收集微分光谱，光谱速度记录为240 nm / min，离开单色谱仪的辐射的光谱宽度1.00 nm，波长增加1 nm。使用“零峰值”和“峰值-峰值”的测量方法。维生素B_3的反相测定是在LiChrospher 100 RP-18色谱柱（250 x 4 mm，10 um）上于260 nm下进行的，使用KH_2P0_4（0.02 M）-甲醇（9：1）的混合物作为流动介质相（流速-1.5 mL / min）。与HPLC的参考方法相比，测定化妆品中维生素B_3的UV方法（D2）准确。

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