Analytical Chemistry

Analytical chemistry is the subject for the method and basic principle of studying and identifying of the composition, status, structure of matter as well as determination of related content. It is an important branch of chemistry subject. Analytical chemistry plays an important role in not only its own development but also in various fields related to the chemistry. We can say that all the practice of any human activity involving chemical phenomena is inseparable from analytical chemistry. Now, people have developed various kinds of different analytical methods, which can be classified based on an analysis task, analysis object, the basis of the analysis, requirement of the analysis and sample dosage.

According to the analysis tasks, it can be divided into qualitative analysis, quantitative analysis and structural analysis. Task of qualitative analysis is to identify the elements, radicals, functional groups or compounds that constituting the substances; the task of the quantitative analysis is to determine the content of the related components in the sample; the task of structural analysis is to study the molecular structure or crystal structure of the material.

(1) According to the analysis objects, it can be divided into organic and inorganic analysis; the object for the inorganic analysis is inorganic substance; the object of organic analysis is organic substance. In the inorganic analysis, it is generally required to determine what elements, ions, radicals or compounds that constitutes the sample and measure the percentage of each component; and sometimes it is also necessary for determination of the crystal structure; in the organic analysis, it not only requires the identification of the constituent elements, but also, more importantly, should do the structure analysis and functional group analysis.
(2) According to whether the analysis is based on the physical properties or chemical properties of the substance, it can be divided into instrumental analysis and chemical analysis. Depending on the specific requirements, it can be divided into routine analysis, rapid analysis and arbitration Analysis. Routine analysis refers to the general daily laboratory production analysis, also known as conventional analysis; rapid analysis is a kind of routine analysis and is mainly applied to the control of the production process, demanding the report of the results in the shortest possible time with the error generally being allowed to be greater; arbitration analysis is needed when there is controversy in the analysis results from different institute, demanding related department to conduct accurate analysis using specific method in order to determine the accuracy of the results of the original analysis.
(3) According to the amount of the sample, it can be generally divided into constant (> 0.1g), semi-micro (0.01 ~ 0.1g) and trace (1 ~ 10mg) analysis.
(4) In the inorganic qualitative chemical analysis, people generally apply semi-micro method while people generally apply constant analysis in the quantitative chemical analysis. According to the relative amounts of the analyzed components contained in the sample, it is also roughly divided into constant component analysis (> 1%), minor component analysis (0.01 to 1%) and trace components analysis (<0.01%). For the analysis of some trace amount of components contained in some kinds of complicated mixture and some substances, it is necessary to perform separation and enrichment. This produces a series of separation techniques, such as extraction, distillation, ion exchange, chromatography, sedimentation and flotation separation, these chemical separation techniques are an integral part of the analysis.

Environmental Analytical Chemistry
Environmental Analytical Chemistry is briefly referred to environmental analysis. It is a kind of subject to study the types, components of pollutants in the environment as well as how to perform qualitative and quantitative analysis on the chemical contaminants in the environment. It is a branch of environmental chemistry.

Environmental analytical chemistry emerged, developed and improved during the process of solving environmental problems. In 1950s, the public nuisance disease occurred in Japan had alerted the whole world. In order to find the cause of public nuisance disease, after experiencing as long as 11 years, later, the chemists of environmental analysis had applied light spectrum and identified that the river in Itai-itai disease area contained harmful elements such as lead, cadmium, arsenic and so on. Further by means of tracking element analysis of the soil and food in the disease area, people had found high lead and cadmium content. Later, people had further conducted spectral quantitative analysis on the body and bone of the patients in the disease area and found that the bone ashes contained alarmingly high content of zinc, lead and cadmium. To determine the causative agent, people further incorporated zinc, lead and cadmium into the food for feeding animals and conduct trace elemental analysis for animals and confirmed the serious harm of cadmium on the bone, revealing the cause of the Itai-itai disease. The development of modern science, especially the development of modern chemistry, physics, mathematics, electronics, biology, as well as the emergence of accurate, reliable, sensitive, selective, rapid, simple environmental pollution analysis technology and automation equipment, has been resulting in the maturation of environmental analytical chemistry. Environmental analytical chemistry now has penetrated into all areas of the entire environmental science subject. It is the most effective means of access to environmental information quality.
The objects of the environmental analytical chemistry research are quite complicated, including air, water, soil, sediment, minerals, waste, animals, plants, food, and human tissue. The content of chemical elements or compound to be determined in the environmental analytic chemistry is very low, with the absolute content being within the level of 10-6 to 10-12 grams.


The analysis technology in the environmental analytical chemistry is developing towards the direction of continuous automation, computerization and joint combination of various methods and instruments. Currently applied automatic analysis methods include colorimetric analysis, ion selective electrode, x-ray fluorescence spectroscopy, atomic absorption spectroscopy, polarography, gas chromatography, liquid chromatography and flow injection analysis. Laser, as the light source of analytical chemistry technique, has also been applied. Since the laser analysis has properties of high resolution, high sensitivity, long-range and short-term, the laser technology will play a pivotal role in the development of environmental analytical chemistry.

With the deepened development of environmental science, environmental analytical chemistry is often demanded for trace levels and ultra-trace-level detection and analysis, therefore, high sensitivity. Thus study of analysis methods of high sensitivity, good selectivity, rapid trace and ultra trace will become the major development direction for environmental analysis in the near future.

Qualitative Analysis of Chemistry
Qualitative analytic chemistry is the subject to identify the chemical elements and atoms groups contained in the sample. It is a branch subject of the analysis chemistry. Its purpose is to ascertain the chemical composition of the research object (specimen).
The major research content of the qualitative analytic chemistry includes:

1 the tested samples were analyzed separately. Namely take part of the sample and use exclusive reaction to detect a desire detection component.
2 systematic analysis of the samples. This means successively apply a few selective reactions for gradual separation of the ions followed by separation of each group until separating to only one substance and finally apply confirming reaction to ascertain the existence of this substance. The most famous cation system analysis method is H2S system. In recent years, due to the use of advanced equipment, qualitative analysis has also rapidly developed together with multivariate analysis and has also become an important direction for analytical chemistry.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
Cadmium  ICP/DCP  standard  solution Cadmium ICP/DCP standard solution Cd
Rare  Earth  Polishing  compound  for  crystal-polishing  kit Rare Earth Polishing compound for crystal-polishing kit
Electrode  Connecting  Wire  with  Lemo/DIN-Connector Electrode Connecting Wire with Lemo/DIN-Connector
PCB  Kit PCB Kit
EPA  Purgeable  Internal  Standard  Mix EPA Purgeable Internal Standard Mix
PVA-NPD PVA-NPD
Selenium  Standard  for  ICP Selenium Standard for ICP Se2
Bovine  eye  (Clenbuterol  blank) Bovine eye (Clenbuterol blank)
DCMA  PCB  Mixture DCMA PCB Mixture
2-Diphenylacetyl-3-(propylidene-hydrazono)indan-1-one,  2-Diphenylacetyl-indan-1,3-dione-1-propylidenehydrazone 2-Diphenylacetyl-3-(propylidene-hydrazono)indan-1-one, 2-Diphenylacetyl-indan-1,3-dione-1-propylidenehydrazone 1119449-20-5 C26H22N2O2
Human  hair  (trace  elements) Human hair (trace elements)
EPA  552  Halogenated  Acetic  Acids  Mix EPA 552 Halogenated Acetic Acids Mix
LC-CN/LC-PCN  Test  Mix LC-CN/LC-PCN Test Mix
EPA  8270  Surrogate  Standards  Mix  1 EPA 8270 Surrogate Standards Mix 1
EPA  505/525  Update  Pesticides  Mix  A EPA 505/525 Update Pesticides Mix A
PVOC  Mix PVOC Mix
Chlorine  in  nitrogen Chlorine in nitrogen
Acetochlor  ethanesulfonic  acid  sodium  salt,  2-[(Ethoxymethyl)(2-ethyl-6-methylphenyl)  amino]-2-oxo-ethanesulfonic  acid  sodium  salt Acetochlor ethanesulfonic acid sodium salt, 2-[(Ethoxymethyl)(2-ethyl-6-methylphenyl) amino]-2-oxo-ethanesulfonic acid sodium salt 947601-84-5 C14H22NNaO5S
Interferonbeta1a/Humaninterferonbeta1a Interferonbeta1a/Humaninterferonbeta1a 145258-61-3
Linolenic Acid-1-13C Linolenic Acid-1-13C C18H30O2
MAGNESIUM IONOPHORE II - COCKTAIL A MAGNESIUM IONOPHORE II - COCKTAIL A
Sodium acetate Acetic acid solution
		
	Sodium acetate Acetic acid solution
Vial
		
	Vial
MethylGammaLinolenate(6c,9c,12c) MethylGammaLinolenate(6c,9c,12c)
MethylNervonate(15c) MethylNervonate(15c)
HYDRANALCOULOMATAG-H HYDRANALCOULOMATAG-H
HYDRANALIMIDAZOLE HYDRANALIMIDAZOLE
4-[(E)-2-[(E)-2-but-3-enoxyethenoxy]ethenoxy]but-1-ene: 1,2-diethenylb enzene: N-(3-dimethylaminopropyl)prop-2-enamide 4-[(E)-2-[(E)-2-but-3-enoxyethenoxy]ethenoxy]but-1-ene: 1,2-diethenylb enzene: N-(3-dimethylaminopropyl)prop-2-enamide 65899-87-8 C30H44N2O4
4-RINGNOGE(NOVOLACGLYCIDYLETHER)MIXTUREOFISOMERS,CHAIN-LIKEORBRANCHED 4-RINGNOGE(NOVOLACGLYCIDYLETHER)MIXTUREOFISOMERS,CHAIN-LIKEORBRANCHED
grevillol grevillol 5259-01-8 C19H32O2
EPOXYBERGAMOTTIN EPOXYBERGAMOTTIN 206978-14-5 C21H22O5
AQUANAL(R)-PLUS MAGNESIUM (MG) CHECK SOLUTION AQUANAL(R)-PLUS MAGNESIUM (MG) CHECK SOLUTION
ddNTP set ddNTP set
Europium, AAS standard solution, Specpure, Eu 1000μg/ml Europium, AAS standard solution, Specpure, Eu 1000μg/ml Eu
Gallium, AAS standard solution, Specpure, Ga 1000μg/ml Gallium, AAS standard solution, Specpure, Ga 1000μg/ml Ga
Indium, AAS standard solution, Specpure, In 1000μg/ml Indium, AAS standard solution, Specpure, In 1000μg/ml In
Gadolinium, AAS standard solution, Specpure, Gd 1000μg/ml Gadolinium, AAS standard solution, Specpure, Gd 1000μg/ml Gd
Uranium, AAS standard solution, Specpure, U 1000μg/ml Uranium, AAS standard solution, Specpure, U 1000μg/ml U
Pentanoic  acid-3,4,5-13C3 Pentanoic acid-3,4,5-13C3 1173023-05-6 C5H10O2
Round  crystal  window Round crystal window
EPA  502/524.2  VOC  Mix EPA 502/524.2 VOC Mix
Butter  fat  (pure  &  adulterated  fat) Butter fat (pure & adulterated fat)
EPA  551B  Halogenated  Volatiles  Mix EPA 551B Halogenated Volatiles Mix
Rice  flour  (amylose,  low  level) Rice flour (amylose, low level)
LEWATIT MONOPLUS MP 64 LEWATIT MONOPLUS MP 64 39433-45-9
51-67-2 51-67-2 51-67-2
rac AMphetaMine Hydrochloride rac AMphetaMine Hydrochloride 2706-50-5 C9H14ClN
Email:[email protected] [email protected]
Copyright © 2024 Mywellwork.com All rights reserved.