نتایج جستجو برای: atomic spectrometer source

تعداد نتایج: 524051  

Journal: :Review of Scientific Instruments 1989

In the present study seven synthetic polymers were used as adsorbents for the removal of Cd(II) from aqueous solution. The equilibrium studies were systematically carried out in a batch process, covering various process parameters that include agitation time, adsorbent dosage, and pH of the aqueous solution. The analyzing system was an atomic absorption spectrometer (Perkin-Analyst 100). It was...

Journal: :Journal of the Vacuum Society of Japan 2012

Journal: :Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering 2001
T Stafilov G Pavlovska K Cundeva D Zendelovska V Paneva

A fast method for separation, preconcentration and determination of cadmium in drinking (source, well, tap) and water for irrigation is described. Iron(III) hexamethylenedithiocarbamate, Fe(HMDTC)3, has the role of colloid precipitate flotation collector. The determination of cadmium in final water solutions preconcentrated by flotation can be performed by flame (FAAS) or electrothermal atomic ...

Journal: :The Annals of occupational hygiene 2006
Peter R Stacey

This paper discusses the proficiency of laboratories analysing identical test samples representative of metals in air in the Workplace Analysis Scheme for Proficiency (WASP) and the variability of results from laboratories used to assess personal exposure in the workplace. Over 11 years, the performance of laboratories has significantly improved for lead, cadmium and chromium. Laboratories show...

Journal: :Analytical chemistry 2005
Yuzhu Guo Jiaxi Wang Gholamreza Javahery Bruce A Thomson K W Michael Siu

An ion mobility spectrometer that has its mobility cell as a 20-segment quadrupole and functionally the q2 of a triple-quadrupole mass spectrometer has been assembled and tested. The combination of high cell pressure (maximum of 4 Torr of helium) and low axial field (20-160 V per 20.2 cm) results in negligible internal excitation of the ions despite applications of rf and axial fields. The pres...

2015
Steven. A. van den Berg Sjoerd van Eldik Nandini Bhattacharya

Optical frequency combs have developed into powerful tools for distance metrology. In this paper we demonstrate absolute long distance measurement using a single femtosecond frequency comb laser as a multi-wavelength source. By applying a high-resolution spectrometer based on a virtually imaged phased array, the frequency comb modes are resolved spectrally to the level of an individual mode. Ha...

Journal: :Journal of the Optical Society of America 1970

1997
David A. Neufeld Jonas Zmuidzinas Peter Schilke Thomas G. Phillips

We report the first detection of interstellar hydrogen fluoride. Using the Long Wavelength Spectrometer (LWS) of the Infrared Space Observatory (ISO), we have detected the 121.6973 μm J = 2 − 1 line of HF in absorption toward the far-infrared continuum source Sagittarius B2. The detection is statistically significant at the 13σ level. On the basis of our model for the excitation of HF in Sgr B2...

Journal: :Physical review letters 2014
A T Gallant M Brodeur C Andreoiu A Bader A Chaudhuri U Chowdhury A Grossheim R Klawitter A A Kwiatkowski K G Leach A Lennarz T D Macdonald B E Schultz J Lassen H Heggen S Raeder A Teigelhöfer B A Brown A Magilligan J D Holt J Menéndez J Simonis A Schwenk J Dilling

Using the Penning trap mass spectrometer TITAN, we performed the first direct mass measurements of (20,21)Mg, isotopes that are the most proton-rich members of the A = 20 and A = 21 isospin multiplets. These measurements were possible through the use of a unique ion-guide laser ion source, a development that suppressed isobaric contamination by 6 orders of magnitude. Compared to the latest atom...

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