(a)
Interpretation:
The name of a laser diffraction instrument, its operation and uses is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique. Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles. soil and its steadiness when wet.
Answer to Problem 34.15QAP
The instrument Partica LA-950 Laser Diffraction Particle size Distribution Analyzer. is built up by Horiba. Have very close tolerances. It is quite automatic in terms of functioning. The accuracy of the instrument is
Explanation of Solution
There is a instrument in the market developed by the company Horiba named as Partica LA-950 Laser Diffraction Particle size Distribution Analyzer.
The material for which test has to be performed, placed in the sample cell. The two laser beams, depending upon the size of the test sample are scattered at an angle. This angle is proportional to the particle size. The scattered light is detected by the photodiode.
The software which controls the instrument correlates the scattered light with particle size.
The instrument is consisting of
(b)
Interpretation:
The range of particle size which instrument can measure is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique. Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles. soil and its steadiness when wet.
Answer to Problem 34.15QAP
The instrument can measure particle size from
Explanation of Solution
The instrument has wide range of measurement of particle size. The range of the instrument is
(c)
Interpretation:
The sampling accessories of Partica LA-950 Laser Diffraction Particle size Distribution Analyzeris to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique.Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles. soil and its steadiness when wet.
Answer to Problem 34.15QAP
The instrument has powder jet dry feeder, miniflow and slurry sampler as the accessories.
Explanation of Solution
The sampling accessories are used for preparation of sample. They had pre-defined dimensions of sample like particle size etc. In the Partica LA-950 Laser Diffraction Particle size Distribution Analyzer there are following sampling accessories are available.
- Powder jet dry feeder
- Miniflow
- Slurry sampler
(d)
Interpretation:
The size of the Partica LA-950 Laser Diffraction Particle size Distribution Analyzer is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique.Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles. soil and its steadiness when wet.
Answer to Problem 34.15QAP
The dimensions of Partica LA-950 Laser Diffraction Particle size Distribution Analyzer is
Explanation of Solution
The size of the instrument is small comparatively.The dimensions of Partica LA-950 Laser Diffraction Particle size Distribution Analyzer is
(e)
Interpretation:
The model used by the software for measurement of particle size is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique.Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles. soil and its steadiness when wet.
Answer to Problem 34.15QAP
The models followed for analysis of particle size are as mentioned below.
- Mie scattering theory
- Fraunhofer diffraction theory
Explanation of Solution
The software helps to correlate the particle size with the scattering angle. There are numerous models available for analysis of particle size. The Partica LA-950 Laser Diffraction Particle size Distribution Analyzer uses the following two models based on the following theories.
- Mie scattering theory
- Fraunhofer diffraction theory
(f)
Interpretation:
The method of automation of particle size analysis is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique.Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles soil and its steadiness when wet.
Answer to Problem 34.15QAP
The method of automation of particle size analysis is fully automated.
Explanation of Solution
The automated analysis makes the particle size measurement more accurate. The Partica LA-950 Laser Diffraction Particle size Distribution Analyzer has auto sampler and built in automation. The slurry sampler is also there which is equipped with a robotic arm sampling system. Therefore in this instrument the analysis of particle size is fully automated.
(g)
Interpretation:
The research paper in which technique of laser diffraction is used for determination of particle size is to be stated.
Concept introduction:
The size of particle is measured by laser diffraction technique.Laser diffraction investigation is utilized here to contrast molecule size dispersions with the help in this case just as discover cycles of progress in estuaries that happen due to various particles soil and its steadiness when wet.
Answer to Problem 34.15QAP
In the paper G.Eshel, et al “2 Critical Evaluation of the use of Laser Diffraction for Particle size distribution Analysis” Soil Sci.Soc. Am. J.
Explanation of Solution
The reference of the paper in the literature is given below
G.Eshel, et al “2 Critical Evaluation of the use of Laser Diffraction for Particle size distribution Analysis” Soil Sci.Soc. Am. J.
In this work the relation between the particle size distribution obtained by the combined sieve-pipette method and similar obtained with laser diffraction method was studied. They used Beckam-Coutler LS-230.
Two different particle sizes were analysed. One set has shown good correlation and another set has shown poor correlation.
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Chapter 34 Solutions
Principles of Instrumental Analysis
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning