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Which of the following analyzers are used to measure trace amounts of nitrogen oxides in the stratosphere?(a) Chemiluminescence(b) CO laser method(c) Laser opto-acoustic spectroscopy(d) ColorimetryI have been asked this question in unit test.The origin of the question is NO2 Analyser in division Industrial Gas Analysers of Analytical Instrumentation |
Answer» Correct answer is (c) Laser opto-acoustic spectroscopy |
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