Spectrophotometric determination of microamounts of …
网页Animesh Sahana, Arnab Banerjee, Sisir Lohar, Amarnath Chottapadhyay, Subhra Kanti Mukhopadhyay, Debasis Das. Lighting of a rhodamine-based fluorescent lamp using ClO4− as a connector: detection by the naked eye and …
Long‐term addition of micro‐amounts of hydrazine enhances …
网页2014年12月1日 · The appropriate addition of N 2 H 4 weakens the inhibitory effect of NO 2− on anaerobic ammonium oxidation bacteria (AnAOB) activity. The effect of long-term addition of micro-amounts of N 2 H 4 was investigated in this study.
Precise carbon isotopic ratio analyses of micro amounts of …
网页2017年10月7日 · Continuous-flow isotope ratio mass spectrometry (CF-IRMS) is a specialized technique used to quickly analyze very small amounts of sample. We have used CF-IRMS to assess the influences of sample weight and relative carbon content on the accuracy and precision of the δ 13 C values of micro amounts of carbonate and non-carbonate in silicate rocks.
Separation of microamounts of fluoride coexisting with large …
网页1985年1月1日 · A rapid distillation method for the separation of fluoride based on the formation of trimethylfluorosilane (TMFS), which is a development of a microdiffusion method devised by Taves [ 1 ] , was reported by Yoshida et al. [2]. In that method, the sample solution was treated with hexamethyldisiloxane (HMDSO) and sulfuric acid.
Solvent extraction of microamounts of cesium into nitrobenzene …
网页2009年6月18日 · In order to minimize the volume of medium level activity waste or to separate long lived nuclides from high level activity waste, it is paramount importance to find compounds able to remove mainly cesium, strontium and actinides (with high efficiency and selectivity) from acidic or high salinity media.
Radiochemical studies of state of lanthanum microamounts in …
网页2005年4月15日 · Microamounts. Gamma spectrometry. 1. Introduction. The nuclear fission of 235 U results in formation of lanthanum isotopes along with other fragment elements. Therefore, the behaviour of lanthanum in some physico-chemical processes, including the process of sorption in inorganic ion exchangers, is of certain scientific interest.
Preconcentration of microamounts of elements in natural waters …
网页1987年1月1日 · A method has been developed for the group concentration of microamounts of metals (Fe, Co, Ni, Mn, Cu, Zn, Cd, Hg, Pb, Bi, Sb, Mo, W, V, Cr, Ga, In, Sn, Ag, Au, Pd, Pt) in the form of their 8-mercaptoquinolinates co-precipitated on bis (8-quinolyl) disulphide as collector, the latter being an oxidation product of 8-mercaptoquinoline.
Spectrophotometric determination of microamounts of …
网页The method was found very accurate, reproducible, and sensitive, capable to determine microamounts of quercetin in pharmaceutical preparations. The complexation process of the transition metal Cu(II) with quercetin was studied.
Extraction of microamounts of calcium into nitrobenzene using …
网页Extraction of microamounts of calcium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of polyethylene glycol ligand PEG 400 (L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+and CsL+are extracted into the organic phase.
Detection of microamounts of novel coronavirus residues in …
网页2021年5月1日 · Detection of microamounts of novel coronavirus residues in environment by digital PCR. The digital PCR detection method established in this study was highly specific, and the minimum detection limit was far lower than that of RT-PCR, of great significance for sensitive and accurate detection of 2019-nCoV infection.