The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Surface-enhanced Raman scattering (SERS) has been applied in a range of fields for its super high sensitivity which can even reach the single molecule level. But the quantification methods based on SERS still have some challenges such as stability, repeatability, and linearity at low concentrations. Here we propose a new quantification approach by using a total mapping scheme, and then add all the...
A facile yet sensitive and selective method was proposed for Hg2+ detection based on N-acetyl-L-cysteine(NAC)-induced colorimetric response of AuNPs. The proposed method can be easily performed by introducing the premixing of NAC and Hg2+ into as-prepared citrate-capped AuNPs solution. A combination of experimental and theoretical studies was applied to illustrate the mechanism of this AuNPs colorimetric...
A simple, rapid and selective one-step displacement cloud point extraction (D-CPE) procedure was developed for the simultaneous preconcentration of trace Cu and Ag followed by flame atomic absorption spectrometric (FAAS) measurement. In this proposed procedure, Ni–DDTC complex instead of DDTC was used to achieve one-step extraction. Since the stability of Cu–DDTC and Ag–DDTC is higher than that of...
Arsine trapping on resistively heated tungsten coil was investigated and an analytical method for ultratrace arsenic determination in environmental samples was established. Several chemical modifiers, including Re, Pt, Mo, Ta and Rh, were explored as permanent chemical modifiers for tungsten coil on-line trapping and Rh gave the best performance. Arsine was on-line trapped on Rh-coated tungsten coil...
Flame furnace atomic absorption spectrometry (FF-AAS) is a newly developed flame atomic absorption spectrometric technique based on arranging a flame furnace onto the top of the flame burner head. In this fundamental investigation, 25 elements were carefully tested by using either thermospray FF-AAS or tungsten coil electrothermal vaporization FF-AAS, of which 15 volatile and semi-volatile elements...
A tungsten coil electrothermal vaporizer (W-coil ETV) was coupled to an Ar/H 2 flame atomic fluorescence spectrometer for the determination of eight traditional hydride-forming elements (i.e., As, Bi, Ge, Pb, Sb, Se, Sn, and Te) as well as cadmium without chemical vapor generation. A small sample volume, typically 20μL, was manually pipetted onto the W-coil and followed by a fixed electric...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.