Analytical chemistry

Bài giảng Hóa phân tích (Analytical chemistry) trình bày về các nội dung chính như: Nhập môn hóa phân tích, cân bằng hóa học, kỷ thuật phân tích thể tích (pp chuẩn độ), cân bằng acid – base và chuẩn độ, phản ứng tạo phức & chuẩn độ, phân tích trọng lượng & cân bằng tủa, phản ứng tạo tủa & chuẩn độ, pin điện hóa & thế điện cực, phản ứng Oxy hóa khử & chuẩn độ điện thế.

25p dieuhang 11-11-2016 189 19   Download

The target of this project is to construct a general and feasible procedure to determine the acidic equilibrium constants in aqueous solution at 25oC from the data of the potentiometric titration process in a rapid, simple and effective way. Then it will be applied to estimate the equilibrium constants of some new acids.

27p tunelove 10-06-2021 14 4   Download

Research objectives of the thesis: The thesis was conducted to research and develop a new type of electrode: glass charcoal electrodes modified by flower platinum nano (PtNFs/GC) and to evaluate the properties of fabricated electrodes: electrode structure, morphology, physical and chemical properties.

28p extraenglish 24-05-2021 32 4   Download

The objects of the thesis: Study and develop the simultaneous analysis method of plant growth stimulants in vegetables using by high-performance liquid chromatography coupled with ion-trapping mass spectrometry. Apply the studied method of analysis and assessment of the current use, residue level and the potential accumulation of plant growth stimulants used in vegetable production in several districts belonged to Hanoi.

28p extraenglish 24-05-2021 14 3   Download

The thesis focused on the synthesis of Mn, Ce, C doped ZnO nanoparticles materials and doped ZnO with multi-layered carbon nanotube nanocomposite materials and assessed their photo-oxidative potentiality through photocatalytic reactions of methylene blue (MB) decomposition in aqueous solution under visible light.

30p capheviahe27 23-02-2021 21 5   Download

Develop a rapid and simple method for analysis of multi-residue pesticides, including organophosphate, organochlorine, carbamate, and pyrethroid compounds in soil, with sample preparation based on QuEChERS technique and determination by GC-MS.

26p capheviahe26 25-01-2021 32 4   Download

Research to develop an analytical method for methyl mercury in biological samples with high sensitivity, selectivity, and accuracy; research and assessment of the transformation and bioaccumulation of mercury in sediment and biological samples in Than Sa gold mining area, Vo Nhai district, Thai Nguyen province.

27p capheviahe26 25-01-2021 33 4   Download

Studying and orienting applicability to detecting, quantifying separately and simultaneously cadmium, lead in aqueous environment by means of stripping voltammetry method with the desire that the nanostructures of the electrodes help increase the sensitivity of the analytical method.

28p capheviahe26 25-01-2021 32 4   Download

This study will be achieved by aiming to: Build the analytical procedure of determination of mercury species in sediment using selective extraction technique . Assess of the reliability of the method of determination of mercury speciation in sediment. Apply the result of study to determine forms of mercury in sediment at a certain area.

27p xacxuoc4321 09-07-2019 24 6   Download

Complexometric titrations many metals form complex with a ligand: Cu++ + NH3 ⇔ Cu(NH3)++ Cu(NH3)2+ + NH3 ⇔ Cu (NH3)22+ Cu (NH3)22+ + NH3 ⇔ Cu (NH3)32+ Cu (NH3)32+ + NH3 ⇔ Cu (NH3)42+ Kf1 Kf2 Kf3 Kf4 Zn (NH3) complexes vs lg NH3 α .• theoretically could titrate Zn with ammonia • stepwise Kf very similar • difficult to know stoichiometry • to ensure all one form, need excess NH3 • titration never gives good equivalence point • can’t use monodentate ligand to titrate metals Titrations with EDTA • • • • use multidentate ligands e.g.

13p doilan 26-01-2013 45 4   Download

-Systematic and random error -Accuracy vs precision -Significant figures -Average and standard deviations ENVI 15 - Analytical Chemistry Lecture 2 Quality Assurance Quality Assurance/Quality Control (QA/QC) Review Harris Chapter 5 A program to produce high quality data with known uncertainty. ENVI 15 - Analytical Chemistry Lecture 2 .

11p doilan 26-01-2013 73 6   Download

Analytical chemistry is the study of the separation, identification, and quantification of the chemical components of natural and artificial materials.[1] Qualitative analysis gives an indication of the identity of the chemical species in the sample and quantitative analysis determines the amount of one or more of these components. The separation of components is often performed prior to analysis

10p doilan 26-01-2013 80 5   Download

Voltammetry techniques measure current as a function of applied potential under conditions that promote polarization of a working electrode. Polarography: Invented by J. Heyrovsky (Nobel Prize 1959). Differs from voltammetry in that it employs a dropping mercury electrode (DME) to continuously renew the electrode surface. Amperometry: current proportional to analyte concentration is monitored at a fixed potential

12p qdung92ct 03-07-2012 81 14   Download

 IUPAC Definition: chromatography is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary while the other moves in a definite direction  Stationary phase (SP): common name for the column packing material in any type of chromatography  Mobile phase (MP): liquid media that continuously flows through the column and carries the analytes  Analyte: the chemical species being investigated (detected and quantitatively measured) by an analytical method...

19p qdung92ct 03-07-2012 83 11   Download