The levels of Al, As, Cd, Cr, Cu, Hg, Mn, Ni, Pb and Se in dried seaweed were analyzed by microwave digestion and ICP-OES based on our previous report26 (link). Briefly, the samples (0.5~2 g) and 6 ml nitric acid were transferred to Teflon-PFA vessels. Samples were digested at180 °C for 30 min by a MARS Xpress Microwave Digestion System (MARS 6, CEM Corporation, Mathews, NC, USA).Afterward, the digested solutions were evaporated to 0.5 ml with an electro-thermal plate and finally diluted to 5 or 10 ml with de-ion water for instrumental analysis. The solution was analysis by ICP-OES (Agilent 720ES, Agilent technologies Inc., USA). Limits of detection (LODs) were defined as 3 times the standard deviation of 10 runs of blank measurements. LODs of Al, As, Cd, Cr, Cu, Hg, Mn, Ni, Pb and Se were 0.015, 0.012, 0.009, 0.008, 0.009, 0.005, 0.007, 0.008, 0.010 and 0.045 mg/kg respectively.
Agilent 720es
Manufactured by Agilent Technologies
Sourced in United States
The Agilent 720ES is an inductively coupled plasma optical emission spectrometer (ICP-OES) designed for the analysis of a wide range of elements in various sample types. It is capable of performing routine, high-throughput elemental analysis with high sensitivity and precision.
Automatically generated - may contain errors
Lab products found in correlation
Mars x press microwave digestion system, by CEM Corporation (1 mentions)
Dxr2xi, by Thermo Fisher Scientific (1 mentions)
Tristar 2 3flex, by Micromeritics (1 mentions)
Ultra 55, by Zeiss (1 mentions)
7000 fluorescence spectrophotometer, by Hitachi (1 mentions)
Nano zs90 analyzer, by Malvern Panalytical (1 mentions)
Uv 2450 spectrophotometer, by Hitachi (1 mentions)
Talos f200, by Thermo Fisher Scientific (1 mentions)
Multimode 8, by Bruker (1 mentions)
Ft ir 6800, by Jasco (1 mentions)
Tensor 27 spectrometer, by Brucker (1 mentions)
Jem 2100f, by JEOL (1 mentions)
Rf 5301pc, by Shimadzu (1 mentions)
Escalab xi instrument, by Thermo Fisher Scientific (1 mentions)
Tecnai g2 f20, by Thermo Fisher Scientific (1 mentions)
Zetasizer nano zs90, by Malvern Panalytical (1 mentions)
Irtracer 100, by Shimadzu (1 mentions)
U 2900 spectrophotometer, by Hitachi (1 mentions)
Quanta 250 feg, by Thermo Fisher Scientific (1 mentions)
D8 rigaku9000, by Bruker (1 mentions)
11 protocols using agilent 720es
1
Trace Metal Analysis in Dried Seaweed
2
Boron Content Analysis in Tumor Tissue
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Mice bearing U-87 MG tumors were injected with 40 µg of 10B equivalent from aza-SWIR-BSH-01 or 10B-BSH condition (n = 3/group). Determination of the boron content in the samples was performed by ICP-AES analyses (Agilent 720 ES) with a detection limit of 0.1 mg/L. The samples were mineralized using 1 mL of aqua regia (mixture of acids: nitric and hydrochloric). After complete mineralization, the samples were diluted with HNO3 (5%, w/w) to reach a 3 mL volume and finally filtered at 0.2 µm for the measurements. The results were expressed as µg of 10B/g of tumor. The experiments were performed at the ISTerre platform, Grenoble.
3
Characterization of CNF@Co3S4 Morphologies
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The morphologies of the CNF@Co3S4 were characterized by scanning electron microscopy (ZEISS Ultra 55) and transmission electron microscopy (JEM‐2100HR). EDS mapping was also analyzed by EDAX analysis system of ZEISS Ultra 55. X‐ray photoelectron spectroscopy was gained from Thermo Scientific K‐Alpha with Al Kα radiation of 30 eV. Brunner–Emmet–Teller measurements were recorded by Micromeritics TriStar II 3flex. Raman spectra was measured by Thermo Fischer DXR 2Xi. ICP test was conducted with Agilent 720ES.
4
Microwave Digestion and ICP-AES Analysis
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The sieved and freeze-dried samples (0.2 g) were microwave digested in Teflon vessels using a mixture of concentrated HNO3, HCl and HF according to the EPA Method 3052 [47 ]. HClO4 was added to remove HF and then adjusted to a volume of 10.0 mL with 2% (v/v) HNO3 before instrumental analysis [48 (link)]. Target elements (Cr, Cu, Pb, Ni, Zn, Cd, As) were analyzed using inductively coupled plasma atomic emission spectroscopy (ICP-AES, Agilent 720 ES, USA). Recovery rates of the analytical procedures were assessed using a standard reference material (SRM 1646a, National Institute of Standards and Technology), and all elements showed a recovery greater than 90% of the certified concentration.
5
Characterization of Gadolinium-Doped Graphene Quantum Dots
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The morphology of the GQDs was subjected to examination using transmission electron microscopy (TEM, FEI Talos F200S, New York, NY, USA) and atomic force microscopy (AFM, (Bruker Daltonics Inc. Multimode 8.0, Massachusetts, MA, USA). The Fourier transform infrared (FT−IR) spectra, UV−Vis absorption spectra, and FL spectra were obtained through utilization of FT−IR spectrometer (FT-IR 6800 JASCO, Marseille, France), Shimadzu UV−2450 spectrophotometer, and Hitachi 7000 fluorescence spectrophotometer, respectively. The hydrodynamic (HD) size and zeta potential of the samples were measured through the utilization of a nano ZS90 analyzer (Malvern Instruments Ltd., Worcestershire, UK), with the measurements being conducted at room temperature. The concentration of Gd3+ within the Gd(DTPA)−GQDs was confirmed through the application of inductively coupled plasma mass spectrometry (ICP-MS, Agilent 720 ES, Santa Clara, CA, USA).
6
Comprehensive Characterization of Material Samples
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The morphology of each sample was investigated via a transmission electron microscopy (TEM, JEM-2100 F, JEOL, Kariya, Japan) with an acceleration voltage of 200 kV. The content of the chemical composition was measured by X-ray photoelectron spectroscopy (XPS, ESCALAB250, Thermo VG, Waltham, MA, USA) using Al Kα radiation. Fourier transform infrared (FT-IR) spectra were collected on a Brucker TENSOR 27 spectrometer. The absorption spectra were characterized by a UV-vis spectrometer (UV, UV-2700, Shimadzu, Kyoto, Japan) with a wavelength ranging from 200 nm to 800 nm. The impurity content in the sample was measured and analyzed by inductively coupled plasma (ICP, Agilent 720ES, Agilent, Waltham, MA, USA). The PL spectra of the samples were measured by a fluorescence spectrophotometer (PL, RF-5301PC, Shimadzu, Kyoto, Japan).
7
Trace and Mineral Elements Analysis
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Trace and mineral elements were measured by Agilent 7500CE ICP-MS and Agilent 720ES ICP-OES (Agilent Technologies Inc., Tokyo, Japan) in testis samples. The content of Mg, Zn, and Fe is relatively high, so ICP-OES was chosen for testing. The contents of Cu, Mn, and Se is relatively low, so ICP-MS was chosen for testing.
8
Characterization of Zinc-Doped Mesoporous Silica Nanoparticles
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Transmission electron microscopy (TEM) images were observed by an FEI Tecnai G2 F20 field-emission transmission electron microscope (FEI, Oregon, USA). The morphology of the nanoparticles was acquired using a Magellan 400 field-emission scanning electron microscope (FEI, Oregon, USA). The size and zeta potential of the nanoparticles were measured in deionized water with dynamic light scattering (DLS) using a Nano ZS90 zetasizer (Malvern Panalytical, Shanghai, China). X-ray photoelectron spectroscopy (XPS) spectra were observed to analyze the valence of the zinc component of Zn-DMSNs by a Thermo Scientific ESCALAB Xi+ instrument (Thermo Fisher, Massachusetts, USA). Analyses of quantitative elemental composition were performed on an Agilent 720 ES (OES) with inductively coupled plasma and optical emission spectrometry (Agilent, California, USA).
9
Characterization of NIPAM-Hemin Copolymer
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Gel permeation chromatography (GPC) was conducted to determine the molecular weight of the NIPAM-hemin copolymer. The copolymer was pumped through sequential columns containing Shodex SB-804 HQ and SB-802.5 HQ resin (Showa Denko, Tokyo, Japan), and poly(sodium 4-styrenesulfonate) was used to construct a standard calibration curve.
NIPAM-hemin (50 μg/mL), hemin (5 μg/mL), poly-NIPAM (100 μg/mL), and NIPAM (100 μg/mL) were each dissolved in dimethyl sulfoxide (DMSO), and absorption spectra were measured using a U-2900 spectrophotometer (Hitachi, Tokyo, Japan). To obtain infrared (IR) spectra, KBr pellets were prepared from dried samples of each reagent, and Fourier-transform infrared (FTIR) spectroscopy was performed using an IRTracer-100 (Shimadzu, Kyoto, Japan) with 20 scans per spectrum, a resolution of 4 cm−1, and a spectral range of 400–4,000 cm−1.
The iron content of the polymer was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) on an Agilent 720-ES (Agilent Technologies, Santa Clara, CA, USA) by treating 12.5 mg NIPAM-hemin with dilute nitric acid, sulfuric acid, and perchloric acid, followed by heating in hydrochloric acid.
NIPAM-hemin (50 μg/mL), hemin (5 μg/mL), poly-NIPAM (100 μg/mL), and NIPAM (100 μg/mL) were each dissolved in dimethyl sulfoxide (DMSO), and absorption spectra were measured using a U-2900 spectrophotometer (Hitachi, Tokyo, Japan). To obtain infrared (IR) spectra, KBr pellets were prepared from dried samples of each reagent, and Fourier-transform infrared (FTIR) spectroscopy was performed using an IRTracer-100 (Shimadzu, Kyoto, Japan) with 20 scans per spectrum, a resolution of 4 cm−1, and a spectral range of 400–4,000 cm−1.
The iron content of the polymer was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) on an Agilent 720-ES (Agilent Technologies, Santa Clara, CA, USA) by treating 12.5 mg NIPAM-hemin with dilute nitric acid, sulfuric acid, and perchloric acid, followed by heating in hydrochloric acid.
10
Characterization of Freeze-Dried Hydrogel with AgCl NPs
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The freeze dryer was turned on to pre-cool well for 2 h, while the hydrogel was frozen at −40 °C. The frozen hydrogel was placed in a cold well, and the vacuum pump was turned on for lyophilization for 48 h to obtain a lyophilized hydrogel in which the morphology remained intact. The freeze-dried hydrogel was used for scanning electron microscope (Quanta FEG-250, FEI, Hillsboro, OR, USA) observation of the cross-sectional structure of the hydrogel. The elements in the sample were analyzed using an energy dispersive spectrometer and X-ray energy spectrum analysis (K-Alpha+, TMO, Waltham, MA, USA). The presence and crystal structure of the AgCl NPs in the freeze-dried hydrogel were analyzed by X-ray diffractometry (D8 Rigaku9000, BrukerAXS, Karlsruhe, Germany). The freeze-dried hydrogel was subjected to synchronous thermal analysis by a thermogravimetry-differential thermal synchronous analyzer (STA449F3, NETZSCH, Selb, Germany). The release concentration of silver ions is analyzed by inductively coupled plasma (Agilent 720ES, Agilent, CA, USA).
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