Chem 253

PREPARATION OF A STANDARD SODIUM HYDROXIDE …

CHEM 253 Quantitative Analysis Laboratory Experiments, 7th Edition, pg 6-11. Objective This lab will introduce you to the concept of the analytical titration. You will learn how to standardize strong acids and bases and how to determine the purity of an impure weak acid. The

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薄膜过滤法在药品检验中的应用 - chem17

表 2 当归补血口服液中阿魏酸含量测定结果 n =5 批号 阿魏酸含量/ (μg·mL21) RSD /% 040906 3. 175 2 1. 60 040914 2. 880 0 1. 49 040830 3. 193 0 2. 33

Appendix E: Ideal Gas Properties of Air

Mixtures of Nitrogen, Argon, and Oxygen from 60 to 2000 K at Pressures to 2000 MPa," J. Phys. Chem. Ref. Data, Vol. 29, No. 3, (2000). For temperatures between 2000 K and 3500 K, the thermodynamic properties are based on data from Keenan, Chao, and Kaye, Gas Tables, Wiley, (1983). Note that these tables can be printed from the

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INTRODUCTION A Tl 857 ULTRAVIOLET-VISIBLE SPECTROSCOPY

Hg 253.7 Hg 296.7 Hg 365.0 Hg 404.7 Hg 435.8 D2 486.0 Hg 546.1 Hg 577.0 Hg 579.1 D2 656.1 RARE EARTH OXIDE SOLUTIONS This procedure uses solutions of rare earth oxides prepared by dissolution in acid media. The most frequently used is holmi-um oxide in perchloric acid. Holmium oxide solution has been internationally accepted as an intrinsic ...

表面增强拉曼散射(SERS)光谱简介 - iccas.ac.cn

2.表面增强拉曼散射(SERS)简介： 表面增强拉曼散射(Surface Enhanced Raman Scattering)最早是由Fleishmann 等人[3]于1974 年发现。他们在研究电化学电池内银电极上吸附的吡啶分子的拉

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Espectrometria de Massas (MS)

21/10/2015 5 O Espectro de Massas Íon base Íon molecular protonado Adutos ? Diferentes termos em MS • Massa nominal: a massa calculada para um íon levando em conta a massa inteira do isótopo mais abundante de cada elemento. • Massa monoisotópica: a massa calculada a partir da massa exata do isótopo mais abundante de cada elemento.

液体への気体の溶解度（1/3） - eng-book.com

液体への気体の溶解度（2/3） NH3 の 水 に 対 す る 溶 解 度 Cl2 の 水 に 対 す る 溶 解 度 100 90 80 70 60 50 40 30 25 20 15 10 7.5 5 4 3 2.5 2 1.6 1.2 1.0 0.5 51.4 48.8 45.8 42.5 38.8 34.6 29.7 24.1 20.9 17.5 13.7 9.57 7.35 5.02 4.06