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![PDF] Determination of water hardness from common water sources using flame atomic absorbance spectrometry | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/69ba379a71ae00dcccac2a4d0689c5373e686ed7/5-Table4-1.png "PDF] Determination of water hardness from common water sources using flame atomic absorbance spectrometry | Semantic Scholar")
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