Icpe 9000 instrument

ICP-AES measurements of 20 elements were completed using an ICPE-9000 instrument (Shimadzu, Kyoto, Japan) at the following operating parameters: radio frequency power, 1.20 kW; plasma gas, 10.0 L min⁻¹; auxiliary gas, 0.60 L min⁻¹; carrier gas, 0.70 L min⁻¹; and view direction, axial. Prior to the elemental analysis, honey samples were pretreated using a Multiwave 3000 (Anton Paar GmbH, Graz, Austria) microwave system, in which 1 g of each honey sample was treated in three steps: 300 W for 5 min, 1000 W for 5 min and 1400 W for 20 min. The instrument was calibrated using inorganic reference standards for a single element (BDH Prolabo Chemicals, VWR International Kft., Debrecen, Hungary). Quality control was assured using a high-purity multielement standard solution containing 25 elements (HPS, RK Tech Kft., Budapest, Hungary). A recovery test was undertaken by spiking rape honey with 20 ppm of the ICP multielement standard mixture. Recoveries for the 20 elements ranged from 93.8% to 111.5%. All analyses were carried out in triplicate. Detection limits (LOD) were as follows: 15.0 mg kg⁻¹ for K, 10.0 mg kg⁻¹ for Ca, 5.0 mg kg⁻¹ for S and Na, 2.0 mg kg⁻¹ for Mg, 1.5 mg kg⁻¹ for P, 1.0 mg kg⁻¹ for B and Al, 0.5 mg kg⁻¹ for Fe and Pb and 0.1 mg kg⁻¹ for As, Cd, Co, Cr, Cu, Mn, Mo, Ni, V and Zn.

UiO68CCG and IR15CCG were synthesized via a previously published process [28 (link)]. Other reagents and solvents were purchased from commercial sources and used without further purification. All experiments were carried out in the ambient atmosphere, unless otherwise mentioned. Powder X-ray diffraction (XRD) patterns were obtained using a Bruker AXS D8 ADVANCE (Bruker Corporation, Billerica, MA, USA). Field emission scanning electron microscope (FE-SEM) observations and energy dispersive X-ray spectrometry (EDX) analyses were carried out via a JEOL JSM-6500F (JEOL Ltd., Akishima, Japan). Transmission electron microscope (TEM) observations and selected area electron diffraction (SAED) analyses were carried out on a JEOL JEM-2010 (JEOL Ltd., Akishima, Japan). Fourier transform infrared (FT-IR) spectra were recorded on a JASCO FT/IR-4100 spectrometer (JASCO Corporation, Hachioji, Japan). Inductively coupled plasma atomic emission spectroscopy (ICP-AES) was carried out by a Shimadzu ICPE-9000 instrument (Shimadzu Corporation, Kyoto, Japan).

ICP-AES measurements of 20 elements were done using an ICPE-9000 instrument (Shimadzu, Kyoto, Japan) at the following operating parameters: radio frequency power, 1.20 kW; plasma gas, 10.0 L·min⁻¹; auxiliary gas, 0.60 L·min⁻¹; carrier gas, 0.70 L·min⁻¹; and view direction, axial. Prior to the elemental analysis, honey samples were pretreated using a Multiwave 3000 (Anton Paar GmbH, Graz, Austria) microwave system, in which 1 g of each honey sample was treated in three steps: 300 W for 5 min, 1000 W for 5 min and 1400 W for 20 min. The instrument was calibrated using inorganic reference standards for a single element (BDH Prolabo Chemicals, VWR International Kft., Debrecen, Hungary). Quality control was assured using a high-purity multielement standard solution containing 25 elements (HPS, RK Tech Kft., Budapest, Hungary). A recovery test was done by spiking rape honey with 20 ppm of the ICP multielement standard mixture. Recoveries for the 20 elements ranged from 93.8% to 111.5%. All analyses were carried out in triplicate. Detection limits (LOD) were as follows: 15.0 mg·kg⁻¹ for K, 10.0 mg·kg⁻¹ for Ca, 5.0 mg·kg⁻¹ for S and Na, 2.0 mg·kg⁻¹ for Mg, 1.5 mg·kg⁻¹ for P, 1.0 mg·kg⁻¹ for B and Al, 0.5 mg·kg⁻¹ for Fe and Pb and 0.1 mg·kg⁻¹ for As, Cd, Co, Cr, Cu, Mn, Mo, Ni, V and Zn.