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<br>electrothermal atomic<br>absorption spectrometry (1)
<br>response surface<br>methodology based on<br>central composite design (1)
<br>tannic acid-coated cerium<br>oxide nanocomposite (1)
Cr (VI) aqueous solution (1)
D-optimal (1)
D-optimal Optimization (1)
Lead (1)
Response surface of methodology (1)
solid phase extraction (1)
Tamarind fruit shell (1)