Potassium and magnesium concentrations in blood collection tubes were determined in solutions obtained by the addition of Milli-Q water in a nominal volume. The VARIAN AA240 Atomic Absorption Spectrometer was used. Experimental conditions are summarised in Table 9 .
Aa240 atomic absorption spectrometer
Manufactured by Agilent Technologies
Sourced in United States
The AA240 Atomic Absorption Spectrometer is a laboratory instrument used for the quantitative determination of chemical elements. It functions by measuring the absorption of light by atoms in a gaseous state, which is proportional to the concentration of the element in the sample. The instrument provides precise and accurate measurements of elemental concentrations in a wide range of sample types.
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Lab products found in correlation
3 protocols using aa240 atomic absorption spectrometer
1
Determination of Potassium and Magnesium
2
Acid Leaching for Metals Quantification
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The total contents of the metals Pb, Zn, and Cd were determined by acid leaching. Approximately 0.5 g of the dried sample was placed in a glass beaker, 40 mL of pre-made 1 + 1 (v/v) nitric(V) acid solution in water (HNO3, Honeywell, Fischer, Racine, WI, USA) was added to the sample, and everything was mixed with a glass stirrer. A hot plate was then used to boil the solution until half of the solution had evaporated. The leachate was then filtered through a filter paper into a 50 mL volumetric flask (white label, IDL Gmbh and Co. KG, Nidderau, Germany). Pb, Zn, and Cd contents were determined with a flame AAS by Varian AA240 Atomic Absorption Spectrometer (Varian, Denver, CO, USA) with a multi-element hollow cathode lamp (HCL) Ag/Pb/Zn/Cd (Varian SpectrAA Lamp) using a gas mixture of acetylene/air. The absorption was measured at wavelengths of 217.0 nm, 213.9 nm, and 228.8 nm for Pb, Zn, and Cd, respectively.
3
pH Effect on Pb(II) Adsorption by PAMPS-g-Ni3Si2O5(OH)4 NTs
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The effect of pH on Pb(ii ) adsorption was studied after adding 50 mg of PAMPS-g-Ni3Si2O5(OH)4 NTs to 100 mL of a Pb(ii ) solution (0.24 mmol L−1) in the pH range of 1.0–6.0. These flasks were shaken in a thermostatic shaker at 298 K for 120 min. The Pb(ii ) concentrations of each sample before and after adsorption were determined by an AA240 atomic absorption spectrometer (Varian, USA). The Pb(ii ) removal rate (R) and adsorption capacity (qe, mg g−1) were calculated according to eqn (1) and (2) , respectively. where qe (mg g−1) is the amount of Pb(ii ) adsorbed per gram of PAMPS-g-Ni3Si2O5(OH)4 NTs at equilibrium, c0 is the initial Pb(ii ) concentration (mg L−1), ce is the residual Pb(ii ) concentration (mg L−1), V stands for the volume of the solution (L), and m is the mass of the adsorbent (g).
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