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Radiochemical Activation Analysis by Accelerated Charged Particles
Published in Zeev B. Alfassi, Max Peisach, Elemental Analysis by Particle Accelerators, 2020
Vandecasteele and co-workers59b studied the determination of sulfur in copper, nickel, and aluminum alloys, by the 34S(p, n)34mCl reaction induced by 13-MeV protons. The copper targets are dissolved in a separatory funnel (1 in Figure 5) to which 25 mL of 14 M HNO3, 0.2 g of AgNO3, and 10 mL of 0.05 M NaCl had been added. The absorption vessels (2) were filled with 10 mL of saturated hydrazine sulfate solution to trap evolved chlorine gas. After dissolution of the contents of the absorption vessels, 45 mL of distilled water and 10 mL of 0.05 M NaCl were added to the separatory funnel and the solution was shaken. The silver chloride precipitate is filtered off on a filter crucible (3) and washed with 0.03 M HNO3. The precipitate is dissolved in 15 mL of 6 M ammonia and filtered by suction; 15 mL of 14 M NHO3 is added to reprecipitate AgCl. The precipitate is filtered on a preweighed filter crucible, counted, dried, and weighed. In the case of nickel targets, 1 mL of hydrofluoric acid (40%) was added to the dissolving solution and the NaCl was dissolved in 14 M HNO3 instead of distilled water.
Theranostic: Cancer Diagnosis and Therapy
Published in Mohammad E. Khosroshahi, Applications of Biophotonics and Nanobiomaterials in Biomedical Engineering, 2017
A solution of tetracholoroauric acid (HAuCl4) solution (5 mM) was prepared and added to the suspension of third generation magnetodendrimer (1% w/v) with the same volume under N2 atmosphere. In order to produce complex between Au (III) and amide or amine group of dendrimer, the resulting mixture was vigorously stirred for one hour at darkness. After that, the amount of 5 mL of aqueous sodium borohydrate solution (0.1 M) was added drop-wise to the reaction mixture.Hydrazine sulfate as a reducing agent (IDA Hydr)
Stability of a small solar pond with different salt gradient layers
Published in International Journal of Ambient Energy, 2019
Ning Tang, Chaoran Yu, Dan Wang, Qing Wang
The sampling time of turbidity was at 14:00 per day. The sampling point was located in the centre of UCZ, at the junction of UCZ and NCZ, at the junction of NCZ and LCZ and at the centre of LCZ. In order to obtain the turbidity, a standard curve of absorbance and turbidity was drawn with the experimental results of UV spectrophotometer at an excitation wavelength of 680 nm as shown in Figure 4. The absorbance test was carried out on an UV-2800 ultraviolet spectrophotometer produced by Unico (Shanghai) Instrument Co., Ltd. The drawing methods of the standard curve are presented as follows. First of all, the solution of hydrazine sulfate [(N2H4)H2SO4] with a concentration of 1 g/100 mL and hexamethylene tetramine [(CH2)6N4] with a concentration of 10 g/100 mL were prepared. Secondly, 5 ml of the above two solutions were mixed thoroughly, and the mixed solution was placed for 24 h at 25°C in a drying oven. Afterwards, the mixed solution was diluted to scale mark in a tub of 100 ml, and it is the standard solution that has 400 degrees of turbidity. Furthermore, the standard solution was diluted to different turbidity in a tub of 50 ml, such as 0.4, 10, 20, 40, 80, and 100 degrees as reference substance. Finally, a standard curve of absorbance and turbidity was drawn, and the turbidity can be determined according to the curve.