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The instruments based on chemiluminescence maintain linearity in which of the following ranges?

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The instruments based on chemiluminescence maintain linearity in which of the following ranges?

(a) 1ppb to 100ppb

(b) 100ppb to 1000ppb

(c) 1ppb to 1000ppb

(d) 100ppb to 1000ppb

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This question is from NO2 Analyser in portion Industrial Gas Analysers of Analytical Instrumentation

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Right option is (c) 1ppb to 1000ppb

For explanation: The instruments based on chemiluminescence maintain linearity between 1ppb to 1000ppb. These are used to measure NO in exhaust gases in vehicles.

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