What does LECO analysis stand for?
Laboratory Equipment Corporation
LECO develops and manufactures elemental measurement and molecular Time-of-flight mass spectrometry instrumentation, following ISO 9000 standards. The LECO trademark is an acronym of the original name, Laboratory Equipment Corporation.
How does a Sulphur Analyser work?
In the induction furnace of the elemental analyzer the sample is melted in a pure oxygen atmosphere, causing sulfur to react to sulfur dioxide (SO2) and carbon to a mixture of carbon monoxide (CO) and carbon dioxide (CO2). The combustion gases pass through a dust filter and moisture absorber for purification.
How does an elemental analyzer work?
Elemental analyzers work by heating an element quickly to a sufficiently high temperature so that it combusts. It is then passed through the analyzer in its gaseous state. A detector detects the elements present, and the researcher reads this information on a computer screen.
What is LECO method?
LECO analysis is a reliable method for determining the concentration of elements within a metallic sample, including Carbon, Hydrogen, Nitrogen, Oxygen and Sulfur. LECO analysis uses infrared absorption and thermal conductivity to measure combustion gases within a metallic sample.
What is inert gas fusion?
Inert gas fusion is a method of determining the quantitative content of gases in ferrous and nonferrous materials where gases, such as hydrogen, nitrogen, and oxygen, are physically and chemically adsorbed by the materials and later removed and swept by from the fusion area by an inert carrier gas.
What is the mixture of sulphur and carbon disulphide?
heterogeneous colloid
A mixture of sulphur and carbon disulphide is a heterogeneous colloid and shows the Tyndall effect. In a colloidal solution, the particles are big enough to scatter light. The scattering of light by colloidal particles is known as the Tyndall effect.
How do you separate carbon and sulphur?
A mixture of sulphur and carbon can be separated by the solvent extraction method. Carbon disulphide or carbon tetrachloride is used as a solvent. The sulphur component gets dissolved in solvent and undissolved carbon is separated by filtration. The dissolved sulphur can be evaporated from the solution.
How accurate is elemental analysis?
Accuracy: Elemental Analysis serves two purposes: The results of an elemental analysis for carbon, hydrogen and nitrogen have traditionally been regarded as acceptable, if the accuracy of the results is within 0.3% of the theoretical value.
How do you calculate elemental analysis?
To figure out the relative proportions of C and H, divide the percentage of each element by its atomic mass: 79.86/12.01 = 6.649, 20.14/1.008 = 19.98. This says that the formula of the compound is C6.649H19.98. This is non-sensical since the numbers of carbon and hydrogen atoms must have integer values.
What is impulse furnace?
Impulse furnace is used for O/N/H analyzers. The sample is placed in a graphite crucible that is positioned between 2 electrodes. Surrounded by inert gas in the graphite crucible, elemental hydrogen H and oxygen O are reduced to H2 and O2 gases while the Oxygen reacts with the carbon from the crucible and generates CO.
Which of the following analysis is used for oxygen analysis?
9. Which of the following analyser is used for oxygen analysis? Explanation: Electrocatalytic analysers are used for oxygen monitoring.
What is the solution of sulphur and carbon disulphide?
Are there any approved methodologies for Leco instruments?
LECO is proud to take an active role in the development of and adherence to these international standards. LECO instruments conform to the approved methodologies for many organizations. Download the pdf file of these approved methods, or view the methods below:
How long has Leco been involved with ASTM International?
LECO has been involved with ASTM International for over 30 years, with employees serving on committees ranging from cement, to nuclear fuel cycle, to additive manufacturing technologies, to mechanical testing , and more.
How is the carbon content of a sample determined?
The mass is converted to percent carbon based on the dry sample weight. The total organic carbon content is subtracted from the total carbon content to determine the total inorganic carbon content of a given sample. Total carbon (TC) includes both inorganic and inorganic sample constituents.
Why is the international language of standards important to Leco?
The international language of standards allows us to communicate our quality in a way any scientist can understand: with proven, reliable, and repeatable results. LECO is proud to take an active role in the development of and adherence to these international standards. LECO instruments conform to the approved methodologies for many organizations.