The elemental composition of the Pd immobilized on the surface of Chit@MnFe2O4 was determined by inductively coupled plasma mass spectrometry (ICP-MS) using a Perkin Elmer ELAN 9000 ICP mass spectrometer (USA). The loading of Pd immobilized on the surface of Chit@MnFe2O4 was determined by dissolving 1.0 mg of Pd-Chit@MnFe2O4 in 3 mL aqua regia. The solution was then topped-up with water to a total volume of 25 mL. The amount of Pd in the solution was determined by ICP-MS.
Elan 9000 icp mass spectrometer
Manufactured by PerkinElmer
Sourced in United States, Canada
The ELAN 9000 ICP mass spectrometer is an analytical instrument used for the quantitative determination of trace elements in a variety of sample types. It employs inductively coupled plasma (ICP) technology coupled with mass spectrometry (MS) to provide highly sensitive and accurate multi-element analysis.
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2 protocols using elan 9000 icp mass spectrometer
1
Pd Loading Quantification on Chit@MnFe2O4
2
Silver Quantification in Biofilms
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Silver species accumulation and release was measured with inductively coupled plasma mass spectrometry (ICP-MS) using the ELAN 9000 ICP mass spectrometer (PerKinElmer, Canada). Samples were analyzed directly to measure dissolved Ag + ions and digested to measure total silver. Microwave digestion was performed as described by Wu et al. [48] (link) and briefly summarized here. 10 mL concentrated nitric acid and 2 mL ultra-pure water were added to 1 g biofilm (wet weight) or 1 mL suspension and kept at room temperature overnight for pre-digestion.
Microwave digestion was then carried out using ETHOS EZ Microwave Solvent Extraction Labstation (Milestone Inc., USA) with the following heating program: heat to 190 °C within 15 min and then hold at 190 °C for 10 min. The particle size and zeta potential of Ag-NPs was characterized using a Malvern Zetasizer Nano-ZS (Model: ZEN3600, Malvern Instruments Ltd, Worcestershire, UK). Since PVP dissolves in water completely, parameters of silver were adopted for the analysis: the refractive index was 2.0 and the absorption coefficient was 0.320 [49] .
Microwave digestion was then carried out using ETHOS EZ Microwave Solvent Extraction Labstation (Milestone Inc., USA) with the following heating program: heat to 190 °C within 15 min and then hold at 190 °C for 10 min. The particle size and zeta potential of Ag-NPs was characterized using a Malvern Zetasizer Nano-ZS (Model: ZEN3600, Malvern Instruments Ltd, Worcestershire, UK). Since PVP dissolves in water completely, parameters of silver were adopted for the analysis: the refractive index was 2.0 and the absorption coefficient was 0.320 [49] .
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