A Rapid Spectrophotometric Method for the Determination of Molybdenum in Industrial, Environmental, Biological and Soil Samples Using 5,7-Dibromo-8-hydroxyquinoline.
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- AHMED M. Jamaluddin
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Chittagong
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- HAQUE M. Enamul
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Chittagong
書誌事項
- タイトル別名
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- Rapid Spectrophotometric Method for the Determination of Molybdenum in Industrial Environmental Biological and Soil Samples Using 5 7 Dibromo 8 hydroxyquinoline
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抄録
A very simple, ultra-sensitive and highly selective non-extractive spectrophotometric method for the determination of trace amount of molybdenum(VI) using 5,7-dibromo-8-hydroxyquinoline (DBHQ) has been developed. 5,7-Dibromo-8-hydroxyquinoline reacts in a slightly acidic solution (0.05 - 1.0 M H2SO4) with molybdenum(VI) to give a deep greenish-yellow chelate which has an absorption maximum at 401 nm. The reaction is instantaneous and the absorbance remains stable for over 24 h. The average molar absorption coefficient and Sandell’s sensitivity were found to be 4.13 × 103 L mol-1 cm-1 and 7 ng cm-2 of molybdenum(VI), respectively. Linear calibration graphs were obtained for 0.1 - 50 μg mL-1 of molybdenum(VI). The stoichiometric composition of the chelate is 1:3 (Mo:DBHQ). A large excess of over 50 cations, anions and some common complexing agents (e.g. EDTA, oxalate, citrate, phosphate, thiourea, SCN-) do not interfere with the determination. The method was successfully used in the determination of molybdenum in several Standard Reference Materials (alloys, steels and waters) as well as in some environmental waters (inland and surface), biological samples (human blood and urine), soil samples, solution containing both molybdenum(V) and molybdenum(VI) and complex synthetic mixtures. The method has high precision and accuracy (S = ± 0.01 for 0.5 μg mL-1).
収録刊行物
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- Analytical Sciences
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Analytical Sciences 18 (4), 433-439, 2002
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679234645888
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- NII論文ID
- 130004440575
- 10011313562
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD38XivFKjurg%3D
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 6138711
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- PubMed
- 11999518
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 使用不可