Atomic hydrogen (H) was introduced into steel (AISI 1018 mild steel) by controlled cathodic pre-charging. The resultant steel sample, comprising about 1 ppmw diffusible H, and a reference uncharged sample, were studied using atomic emission spectroelectrochemistry (AESEC). AESEC involved potentiodynamic polarisation in a flowing non-passivating electrolyte (0.6 M NaCl, pH 1.95) with real time r...

Chandrakanthi Chooranam, a siddha sastric herbomineral formulation comprises of 25 ingredients. Literature review evidenced no standardization work so far. Authors aims to investigate various analytical standardization parameters such as physicochemical standards, preliminary phytochemical analysis, Thin Layer Chromatography (TLC) photo documentation, High Performance Thin Layer Chromatography ...

Baixas concentrações dos catorze elementos de ocorrência natural da série lantanídeos foram diretamente determinadas por espectrometria de emissão óptica com plasma indutivamente acoplado (ICP OES). Avaliaram-se interferências espectrais e linhas espectrais mais adequadas foram selecionadas. Os desempenhos da nebulização pneumática e ultra-sônica foram comparados com respeito aos limites de det...

A validation study in order to evaluate the efficiency of the inductively coupled plasma optical emission spectrometry (ICP-OES) in the analysis of minor elements (Manganese, Chromium, Copper, Iron and Titanium) in aluminium alloys was carried out. Aluminium casting samples were obtained from addition to aluminium baths of compressed powder compacts of each alloying element and aluminium (minit...

Foram comparados vários procedimentos de preparo de amostras, isto é, decomposição total de uma mistura HNO3/H2O2 em placa de aquecimento, decomposição parcial por meio de solubilização em aqua regia e diluição com solução de HNO3 de baixa concentração, para determinação do conteúdo total de Ba, Ca, Cd, Cr, Cu, Fe, Mg, Mn, Ni, P, Pb, Sr e Zn em bebidas energéticas utilizando espectrometria de e...

Optical emission spectra ~OES! from CH4/N2 rf plasmas, which are used for the deposition of nitrogen-containing hydrogenated amorphous carbon ~a-C:H:N! thin films, have been characterized. Previously unidentified spectral lines have been assigned to atomic N. Further identified species include CH, H, H2, N2, N2 1 , N, and CN. Variations between spectra from the pure CH4 or N2 plasmas and the mi...

Current waste management policies favor biogases (digester gases (DGs) and landfill gases (LFGs)) valorization as it becomes a way for energy politics. However, volatile organic silicon compounds (VOSiCs) contained into DGs/LFGs severely damage combustion engines and endanger the conversion into electricity by power plants, resulting in a high purification level requirement. Assessing treatment...

Yogurt, a traditional Turkish dairy product is common in all region of Turkey. The different heavy metals were determined in commercial yogurts by inductively coupled plasma optical emission spectrometer (ICP–OES). Concentrations of calcium (Ca), phosphorus (P), sodium (Na), magnesium (Mg), aluminum (Al), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), boron (B), molybdenum (Mo), cadmium (Cd...

In the development of the FrontierTM OpticaTM, PerkinElmer has addressed the well known sources of error in the measurement of challenging optical materials with standard FT-IR instruments. The resulting improved performance over the previous standard of the optical industry is demonstrated by both the verification carried out internally, and also by that carried out by an external test laborat...

Vitamin D2 (ergocalciferol) and D3 (cholecalciferol) can be procured from exogenous sources. These are then metabolized to 25-hydroxyvitamin D (25OHD2 and 25OHD3) in the liver. Measuring the levels of both 25OHD2 and 25OHD3 is imperative in assessing clinical nutritional status [1]. Vitamin D2 or D3 is provided as a vitamin D supplement in many countries. Serum 25OHD levels can be measured by c...