A Sorbent Extraction Procedure for the Preconcentration of Gold, Silver and Palladium on an Activated Carbon Column

Cloud Point Extraction for the Preconcentration of Silver and Palladium in Real Samples and Determination by Atomic Absorption Spectrometry

“…Due to presence of trace metals at low levels in environmental samples and matrix effects, different separation and preconcentration techniques such as liquid-liquid extraction [10,11], solid phase extraction [12], sorbent extraction on various adsorbents such as activated carbon [13], precipitation [14], ion exchange [15] or flotation [16] are necessary, which can solve these problems and lead to higher confidence levels and easy determination of trace elements. Cloud point extraction (CPE) is an interesting and efficient alternative which is in agreement with green chemistry principles, since it reduces the consumption of and exposure to solvents, has a low cost and extraction time, and surfactants are non toxic, non volatile and not very flammable [17,18].…”

<b>Application of Triton X-100 coated poly vinyl chloride as new solid phase for preconcentration of Fe³⁺, Cu²⁺ and Zn²⁺ ions and their flame atomic absorption spectrometric determinations</b>

“…Flame atomic absorption spectrometry (FAAS) has been widely used for the determination of trace metal ions because of the relatively simple and inexpensive equipment. However, direct determination of metal ions at trace levels by FAAS is limited not only due to insufficient sensitivity, but also by matrix interference [4][5][6][7]. For this reason, preliminary separation and preconcentration of trace elements from the matrix is frequently necessary to improve the detection limit and the selectivity.…”

Simultaneous Coprecipitation of Pd(ii), Rh(iii) and Au(iii) With Mn(oh)2 Without Chelating Agent Prior to Flame Atomic Absorption Spectrometry Determination

“…[7][8][9][10][11] In order to solve these problems, separation-enrichment techniques including solid phase extraction, cloud point extraction, liquid-liquid extraction, coprecipitation, etc. [12][13][14][15][16][17][18] have been used by the researchers around the world. Coprecipitation has also an important place in the preconcentration and separation methods due to its some advantages including simplicity, high preconcentration factors, and low consumption of organic solvent and short analysis time period for the procedures.…”