Model 7900

Manufactured by Agilent Technologies

Sourced in United States

The Model 7900 is a high-performance inductively coupled plasma mass spectrometer (ICP-MS) manufactured by Agilent Technologies. It is designed for accurate and precise multi-element analysis of a wide range of sample types.

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Lab products found in correlation

Trace metal grade nitric acid, by Thermo Fisher Scientific (2 mentions) Glp31, by Crison (2 mentions) Zetasizer ver 7, by Malvern Panalytical (1 mentions) S8 tiger spectrometer, by Bruker (1 mentions) H2o2 p a, by Merck Group (1 mentions) Glp 21, by Crison (1 mentions) Multi element standard solution, by Merck Group (1 mentions) Alpha 1 4, by Martin Christ (1 mentions) Glp 21 ph meter, by Crison (1 mentions) Hydrogen peroxide, by Merck Group (1 mentions) Suprapur, by Merck Group (1 mentions)

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Model 7900 ICP-MS (2 citations)

12 protocols using model 7900

Soil Salinity Assessment in Agroforestry

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The area surrounding one central tree in each replicate was selected to collect data for the analyses. Three soil samples were collected per replicate four times per year at 0-25 cm and 25-50 cm depths and 0.30 m away from the emitter. A total of 144 samples were collected during the experiment. Soluble salt contents were determined in the saturated paste extract as described by Rhoades [20] . The electrical conductivity of the saturated paste extract (EC e ) was measured with a conductivity GLP-31 meter (Crison Instruments, Barcelona, Spain). An inductively coupled plasma (ICP-MS Agilent Technologies, Model 7900, Santa Calara, CA, USA) was used to determine the concentration of water soluble Na + , Ca 2+ , and Mg 2+ . The sodium adsorption ratio (SAR e ) was also calculated from the concentration of Na + , Ca 2+ , and Mg 2+ measured in the saturated paste extract. The sodicity risk due to the irrigation water quality was analyzed based on the relation of the SAR w and the EC w . Extractable B 3+ was determined in soil samples by refluxing 20 g soil with 40 mL hot water (boiling) for a period of 5 min. One aliquot from the filtered extract was then used for measuring B 3+ using an inductively coupled plasma (ICP-MS Agilent Technologies, Model 7900, Santa Calara, CA, USA).

Maestre-Valero J., Álvarez V.M., Jódar-Conesa F.J., Acosta J.A., Martı́n B., Robles J., Pérez-Pérez J., & Navarro J.M. (2020). Short-Term Response of Young Mandarin Trees to Desalinated Seawater Irrigation. Water, 12(1), 159-159.

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Quantifying Total Iron by ICP-MS

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Total iron concentrations in the samples were measured by ICP-MS (Agilent model 7900). For each sample, 200 μL of concentrated trace-metal-grade nitric acid (Fisher) was added to 25 μL or 100 μL of sample taken in a 15-mL Falcon tube. Tubes were sealed with electrical tape to prevent evaporation, taken inside a 1-L glass beaker, and then placed at 90°C oven. After overnight digestion, each sample was diluted to a total volume of 4 mL with deionized water and then analyzed by ICP-MS.

Mamais A., Kluss J.H., Bonet-Ponce L., Landeck N., Langston R.G., Smith N., Beilina A., Kaganovich A., Ghosh M.C., Pellegrini L., Kumaran R., Papazoglou I., Heaton G.R., Bandopadhyay R., Maio N., Kim C., LaVoie M.J., Gershlick D.C, & Cookson M.R. (2021). Mutations in LRRK2 linked to Parkinson disease sequester Rab8a to damaged lysosomes and regulate transferrin-mediated iron uptake in microglia. PLoS Biology, 19(12), e3001480.

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Comprehensive Characterization of Sugar Press Mud

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The characterisation of sugar press mud was done using various techniques. The chemical functional groups associated with dry PM were analysed in the transmittance mode of an FTIR spectrophotometer (Perkin-Elmer1600). The colloidal suspension of PM in water was analysed using (DLS) Zetasizer Ver. 7.11 (Malvern Instruments). The mineral profiling of dry sugar press mud was done (ICP-MS, Agilent Technologies make Model: 7900) following acid-based microwave digestion. The mineral mapping used SEM-EDX (Oxford-EDX system IE 250 X Max 80, Netherlands).

Verma L.M., Kumar A., Kumar A., Singh G., Singh U., Chaudhary S., Kumar S., Sanwaria A.R., Ingole P.P, & Sharma S. (2024). Green chemistry routed sugar press mud for (2D) ZnO nanostructure fabrication, mineral fortification, and climate-resilient wheat crop productivity. Scientific Reports, 14, 4074.

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Quantifying Total Iron and Zinc

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Total iron and zinc content in the samples were measured by ICP-MS (Agilent model 7,900). For each sample, 200 µL of concentrated trace-metal-grade nitric acid (Fisher) was added to 200 µL of sample taken in a 15-mL Falcon tube. The tubes were then incubated at 85 °C in an oven for overnight digestion. Each sample was diluted to a total volume of 4 mL with deionized water, and analyzed by ICP-MS.

Maio N., Raza M.K., Li Y., Zhang D.L., Bollinger JM J.r., Krebs C, & Rouault T.A. (2023). An iron–sulfur cluster in the zinc-binding domain of the SARS-CoV-2 helicase modulates its RNA-binding and -unwinding activities. Proceedings of the National Academy of Sciences of the United States of America, 120(33), e2303860120.

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Aquifer Water Characterization and Ionic Synthesis

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Aquifer water (AW) was
acquired from a coal mine located in Gaoping City, Shanxi Province,
China. The aquifer water was analyzed for its constituents using inductively
coupled plasma-mass spectrometry (ICP-MS, model 7900, Agilent Technology,
United States). The dissolved ions are given in Table 1. Ionic water was then synthesized in-house
from sodium chloride (NaCl), calcium chloride (CaCl₂),
magnesium chloride (MgCl₂), sodium hydrogen carbonate (NaHCO₃), and sodium sulfate (Na₂SO₄), all
supplied by Sigma-Aldrich.
Sodium silicate (SS) was purchased from Tianjin Hengxing
Chemical
Reagents Co., Ltd., 99.99% pure. The fundamental properties of SS
are given in Table 2.
Fractured rock was tested for its oxide composition
that was determined
by X-ray fluorescence spectroscopy (XRF, model S8 Tiger spectrometer,
Bruker, Germany) as given in Table 3.

Ngo I., Ma L., Zhai J., Wang Y., Wei T, & Ni Y. (2022). Experimental Investigation of CO2-Induced Silica Gel as the Water Blocking Grout Effect of Aquifer Ions. ACS Omega, 7(31), 27090-27101.

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Quantification of NPs Distribution

Cited 1 time

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Systemic distribution of NPs in blood and to various organs, such as spleen, kidney, liver, brain, and lymph nodes (LNs), was quantified by elemental analysis of Ce using inductively coupled plasma mass spectrometry (ICP-MS) (Matter et al., 2020 (link)). To this end, whole blood (100 μL) or organ samples (50–300 mg) were transferred to a polytetrafluoroethylene container and mixed with 3 mL of 65% HNO₃ p. a. (Merck) and 1 mL of 30% H₂O₂ p. a. (Merck). These samples were then digested using a microwave (TurboWAVE, MLS GmbH, Germany) at 250°C and 120 bar for 18 min. Cerium was then quantified using ICP-MS (Model 7900, Agilent, Santa Clara, CA) (Oertli et al., 1994 (link); Kulber et al., 1997 (link)) by measuring isotope Ce140. Lu175 was used as an internal standard to correct for non-spectral interferences (Matter et al., 2017 (link); Lese et al., 2021 (link)).

Pais M.A., Papanikolaou A., Hoyos I.A., Nißler R., De Brot S., Gogos A., Rieben R., Constantinescu M.A., Matter M.T., Herrmann I.K, & Lese I. (2024). Bioglass/ceria nanoparticle hybrids for the treatment of seroma: a comparative long-term study in rats. Frontiers in Bioengineering and Biotechnology, 12, 1363126.

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Soil Physicochemical and Elemental Analysis

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The soil used in this study was collected from micromodel complex (CRDT, IIT Delhi, New Delhi, India coordinates (28° 32′ 42″ N, 77° 11′ 32″ E). The soil sampling and analysis were done following the protocol described by Yusefi-Tanha et al.^{11 (link)}. The physicochemical analysis of soil samples like electrical conductivity (EC) and the pH estimation was done using a pH meter (pH510 Eutech and EC meter CON 510 Eutech instruments, India) by preparing soil: water suspension 1:10 (pH) and 1:5 (EC) respectively^{19 (link)}. The CHN analyser (CHNOS Elementary, Vario EL III model) was used for soil samples' C, H, and N analysis. For mineral analysis (ICP-MS, Agilent Technologies make Model: 7900), microwave acid digestion was used. The post-harvest analysis of soil samples was done for minerals, CHN and exchangeable Zn following the protocol described above.

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Evaluating Fertilizer Delivery System

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The sampling tank collected a total irrigation volume (water + fertilizer) of 1 m³ for each test. Samples of 0.5 L per test (1 type of water + 1 fertilization prescription) were collected in glass bottles and transported in an icebox to the laboratory. They were stored at 5 °C before being processed for physical and chemical analyses.
The EC of the water was measured with a conductivity instrument GLP-31 (Crison Instruments S.A., Barcelona, Spain), and the pH was measured with a pH-meter GLP-21 (Crison Instruments S.A., Barcelona, Spain). An inductively coupled plasma (ICP-MS Agilent Technologies, Model 7900, Santa Clara, CA, USA) was used to determine the concentrations of Na⁺, K⁺, NH₄⁺, Ca²⁺ and Mg²⁺. Anions (Cl^-, NO₃^-, PO₄^3- and SO₄^2-) were quantified by ion chromatography with liquid chromatograph (Thermo Scientific Dionex, Model ICS-2100, Thermo Scientific, Basel, Switzerland).
The concentrations measured in the samples were compared to the concentrations obtained theoretically with the NutriBalance program in order to assess the system’s ability to accurately provide different concentrations of fertilizers with varying feed waters.

Imbernón-Mulero A., Maestre-Valero J.F., Martínez-Alvarez V., García-García F.J., Jódar-Conesa F.J, & Gallego-Elvira B. (2023). Evaluation of an autonomous smart system for optimal management of fertigation with variable sources of irrigation water. Frontiers in Plant Science, 14, 1149956.

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Chitosan-Mediated Synthesis of Selenium Nanoparticles

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The synthetic procedure is briefly described as follows: Chitosan (1.80 mL, 0.10–0.20% w/v) was mixed with 15.12 mL of DI water under the rotator mixer for 30 min. Next, 0.18 mL of 0.1 M sodium selenite solution was slowly added to the mixture, and then 0.18 mL of 20 µM coumarin-6 in ethanol was added. After 30 min, 0.72 mL of 0.1 M l-ascorbic acid solution was added dropwise into the mixture. Next, the mixture was rotated overnight to obtain the orange–red color liquid phase. Samples were placed in a dialysis bag (MWCO: 12,000–14,000, T series; Cellu-sep, San Antonio, TX, USA) and dialyzed overnight against ultrapure water at 4 °C to eliminate interference from L-ascorbic acid and its oxidation products. The absolute concentration of Se was determined by inductively coupled plasma mass spectrometry (ICP-MS; Model 7900, Agilent Technologies, Santa Clara, CA, USA). The coumarin-6-labeled SeNPs were synthesized using a similar method except the addition of chitosan.

Dana P., Pimpha N., Chaipuang A., Thumrongsiri N., Tanyapanyachon P., Taweechaipaisankul A., Chonniyom W., Watcharadulyarat N., Sathornsumetee S, & Saengkrit N. (2022). Inhibiting Metastasis and Improving Chemosensitivity via Chitosan-Coated Selenium Nanoparticles for Brain Cancer Therapy. Nanomaterials, 12(15), 2606.

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Elemental Analysis of Lyophilized Fish Soup

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The samples were transferred to the laboratory in frozen form. The fish soup samples were lyophilized using a lyophilizer (ALPHA 1-4, CHRIST, Germany). Then, the samples were decomposed by microwave method and analysed for metals using inductively coupled plasma Mass Spectrometer (ICP-MS). About 0.5 g of lyophilized sample was weighed into a TFM vessel (Microwave oven ETHIOS Etouch control) and treated with 6vmL of HNO3 (65% Fluka-Sigma, Germany) and 2mL of hydrogen peroxide (30%, Belinka) was added. The vessels were closed and transferred into the microwave oven. The microwave digestion program was carried out under two steps as 1 st step included 10 mins ramp time at 180 o C with 1000-Watt microwave power, then 2 nd step with 10 mins hold time at 180 o C with 1000-Watt microwave power. Then the vessels were cooled, the digested solutions were transferred into the 25 mL volumetric flasks and made up to volume with MQ water (for chromatography, > 18,2 MΩ/cm, Aldrich, Germany). Dilution according to the desired concentration range was made before measurements. Multi element standard solution (Merck KGaA, Germany) for calibration was used in metal analysis. A blank digest is carried out in the same way. All minerals were determined using an ICP-MS (Agilent Technologies, Model 7900) against aqueous standards. The mineral concentration is expressed as mg mineral/kg fish dry weight.

Köse S., Pompe M., Tufan B., Veber M., Kočar D., & Petkovsek E. (2021). Nutritional value of fish soup from cultured brook trout (Salvelinus fontinalis, Mitchill, 1814). Ukrainian Food Journal, 10(1), 112-123.

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