Encyclopedia > Substitution

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In general, substitution is the replacement of one thing with another. There are many specific examples:

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Winkler test for dissolved oxygen

... 70% (CORROSIVE) Sample bottles of river or pond water Latex gloves Safety glasses[?] Stage 2 Sulphuric acid 50% (CORROSIVE) Sodium thiosulphate[?] 0.31% ...