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- W2071691741 abstract "Stable isotopes of chlorine, oxygen, nitrogen, strontium, and hydrogen can be used as forensic indicators to fingerprint and possibly differentiate perchlorate plumes. Direct analytical methods involve isotope ratio mass spectrometry (IRMS) of δ37Cl and δ18O, which comprise the perchlorate anion (ClO4 −). Plots of δ37Clperchlorate versus δ 18Operchlorate have been used to differentiate between anthropogenic and geogenic (natural) perchlorate sources. Indirect analytical methods involve the stable isotopic analysis of substances associated with perchlorate. These can be used as surrogates and include δ15N and δ 18O in dissolved nitrate, and 87Sr/86Sr in solid and/or dissolved strontium nitrate associated with potassium perchlorate in safety flares. Strontium compounds may also exist as impurities in ammonium and other perchlorate compounds. Stable isotopes of δ18O and δ2H in water can be used to differentiate different groundwater sources such as those from river recharge or precipitation. Other indirect methods include analysis of radiogenic isotopes such as tritium (T) and helium-3 (3He), which can be used to approximate the mean residence time (“age”) of relatively young groundwater." @default.
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- W2071691741 date "2006-03-01" @default.
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- W2071691741 title "Stable and Other Isotope Techniques for Perchlorate Source Identification" @default.
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