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This paper presents the variation of elemental concentrations of total carbon (TC), total nitrogen (TN) and isotopic ratios of δ13C and δ15N along with δ13OC and OC of PM10 mass over Delhi, Varanasi and Kolkata of the Indo Gangetic Plain (IGP), India. For Delhi, the average concentrations of TC and TN of PM10 were 53.0 ± 33.6 and 14.9 ± 10.8 µg m−3, whereas δ13C and δ15N of PM10 were −25.5 ± 0.5 and...
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