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Method of trivalent chromium concentration determination by atomic spectrometry

Patent ·
OSTI ID:985344
 [1];  [2]
  1. Tbilisi, 0183, GE
  2. Tbilisi, 0101, GE
+ Show Author Affiliations
A method is disclosed for determining the concentration of trivalent chromium Cr(III) in a sample. The addition of perchloric acid has been found to increase the atomic chromium spectrometric signal due to Cr(III), while leaving the signal due to hexavalent chromium Cr(VI) unchanged. This enables determination of the Cr(III) concentration without pre-concentration or pre-separation from chromium of other valences. The Cr(III) concentration may be measured using atomic absorption spectrometry, atomic emission spectrometry or atomic fluorescence spectrometry.
Research Organization:
MEMORANDUM OF UNDERSTANDING (MOU)
Sponsoring Organization:
USDOE
Assignee:
Reheulishvili, Aleksandre N. (Tbilisi, 0183, GE); Tsibakhashvili, Neli Ya. (Tbilisi, 0101, GE)
Patent Number(s):
7,148,068
Application Number:
US patent applciation 10/403,296
OSTI ID:
985344
Country of Publication:
United States
Language:
English

References (8)

On-line chromatographic separation and determination of chromium(III) and chromium(VI) with preconcentration of the chromium(III) using potassium hydrogen phthalate, in various samples by flame atomic absorption spectrometry journal January 1996
Determination of Trace Metals in Waters by FAAS after Enrichment as Metal-HMDTC Complexes Using Solid Phase Extraction journal May 2002
Flame Atomic Absorption Spectrometric Determination of Total Chromium and Cr(VI) in Cigarette Ash and Smoke using Flow Injection/Hydraulic High-Pressure Sample Introduction journal March 1998
On-line sorption preconcentration of chromium(VI) and its determination by flame atomic absorption spectrometry journal November 1997
On-line separation and preconcentration of chromium species in seawater journal May 1996
Cr(III) and Cr(VI) On-Line Preconcentration and High-Performance Flow Flame Emission Spectrometric Determination in Water Samples journal October 1996
Possibilities for the simultaneous preconcentration and flame atomic absorption spectrometric determination of Cr(III) and Cr(VI) using a C18 column and sorption loop journal March 1999
Cr(III) and Cr(VI) on-line preconcentration and determination with high performance flow flame emission spectrometry in natural samples journal June 1996

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY