7700 agilent icp ms spectrometer

A 7700 Agilent ICP-MS spectrometer equipped with a MicroMist™ nebulizer and Peltier-cooled double-pass spray chamber was used for the characterization of silver nanoparticles at 107 amu. The ICP-MS operating parameters are as follows: RF power—1.55 kW; sample flow rate—0.322 mL min⁻¹; carrier Ar gas flow rate—1.2 L min⁻¹; acquisition time 60 s; dwell time 5 ms; and transport efficiency 0.032. The transport efficiency was determined by using the particle-size method [55 (link)]. Ultrapure water (UPW) was used throughout the experiments (PURELAB Chorus 2+ (ELGA Veolia, High Wycombe, UK) water purification system). For the sonication of silver colloids, an ultrasonic bath (Kerry US, Burlingame, CA, USA) was used. Reference materials (RM) of citrate-stabilized silver dispersions Ag NPs (Sigma-Aldrich, Saint Louis, MO, USA) with mean size 40 ± 4 nm and total mass concentration of silver 0.02 mg mL⁻¹ were used in this study for transport efficiency determination and calibration.
A standard solution of Ag 9.974 ± 0.041 mg L⁻¹ in 2% HNO₃, (CPAchem Ltd., Bogomilovo, Bulgaria) was used for the preparation of ionic standards.

A 7700 Agilent ICP-MS spectrometer (Agilent Technologies, Tokyo, Japan) equipped with MicroMist™ nebulizer and Peltier cooled double-pass spray chamber was used for the characterization of silver nanoparticles at 107 amu. The ICP-MS operating parameters were as follows: RF power—1.55 kW; sample flow rate—0.336 mL min⁻¹; carrier Ar gas flow rate—1.2 L min⁻¹; acquisition time 60 s; dwell time 5 ms; and transport efficiency 0.032. The transport efficiency was determined by the particle-size method [66 (link)]. Ultrapure water (UPW) was used throughout the experiments (PURELAB Chorus 2+ (ELGA Veolia) water purification system). For the sonication of silver colloids, an ultrasonic bath (Kerry US) was used. Reference materials (RMs) of citrate-stabilized silver dispersions Ag NPs (Merck Bulgaria EAD) with mean size 40 ± 4 nm and total mass concentration of silver 0.02 mg mL⁻¹ were used in this study for transport efficiency determination and calibration.
A standard solution of Ag 9.974 ± 0.041 mg L⁻¹ in 2% HNO₃ (CPAchem Ltd., Bogomilovo, Bulgaria) was used for the preparation of ionic standards.