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Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
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Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry

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Environment: China deploys big data to clear smog

Bo Zhang¹, Robert M Hughes²

¹Information Center, Ministry of Environmental Protection, China.

|February 3, 2017

Summary

No abstract available in PubMed .

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