In the experiment,glass chest was used to simulate indoor roomage environment.The formaldehyde concentration in the simulative room was measured by the method of acetyl acetone with spectrophotometer.

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Compared with the spectrophotometer method, the gas chromatography method is simple, rapid, accuracy, and better repeated.

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Methods The determination was performed by spectrophotometry, and compared with flame atomic absorption spectrometry.

方法采用分光光度法測定，并與火焰原子吸收光譜法進行對比高清免费毛片。

Quantitative analysis of protein adsorption: The PS suspension containing lysozyme was subjected to ultracentrifuge (15 000 r/min) to collect clear aqueous solution. The lysozyme concentration in the clear solution was measured by spectrophotometry at 280 nm. The amount of protein adsorbed on PS surface was calculated based on the decrease in the protein concentration in the supernatant solution.

蛋白吸附定量分析：采用高速離心(15 000 r/min)法從含溶菌酶蛋白的聚苯乙烯懸浮液中分離出上清液黄色网站真人版，用紫外(280 nm)分光光度法測定經(jīng)聚苯乙烯微球表面吸附后，液相蛋白質(zhì)量濃度的下降值国产区视频综合影院，由此推算蛋白在聚苯乙烯表面的吸附量色色视频久久激情。

Heated in water bath,uranyl ion and nitrate radical adsorbed on resin are replaced into solution by sodium bisulfate,then are determined by titanous method and spectrophotometry,respectively.

在水浴加熱條件下，用硫酸氫根將吸附在樹脂上的鈾酰離子和硝酸根離子置換到液相中狼友免费高清无码视频，之后分別采用亞鈦法国语对白操、分光光度法進行測定。

Water samples were eollected from the lakes in East plain, Yungui plateau and Mengxing plateau since 1993. Mineralized degree were analyzed using volumetry and flame photometry.

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Ferrous Oxidation in Xylenol Orange is a spectrophotometry to detect primary product of Lipid peroxidation in plasma -- Lipid HydroperoxidesIn acid dilute solution,ROOH can oxidate Fe2+ into Fe3+,and Fe3+ can combine with Xylenol Orange to produce a kind of bluish - purple compound.

本文介紹一種用FOX法測定血漿中脂質(zhì)過氧化的初級產(chǎn)物——脂質(zhì)氫過氧化物的分光光度法免费AAA级黄片。

MethodsThe FTIR was utilized to investigate the different parts of Abrus cantoniensis, the secondary derivative spectra and semi-quantitative analysis were used to analysis difference constituents of different parts of Abrus cantoniensis,.

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Mineral elements of Alnus nepalensis were determinate by atomic absorption spectrophotometer, the distribution characteristics and the accumulation index were also investigated by correlation analysis .

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Rats was cannulated for in situ recirculation. UV and HPLC methods were used to determine the concentrations of phenolsulfonphthalein and scopoletin, respectively.

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