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| Thesis Name： |
Study on the solid phase extraction and spectrophotometric determination of gold in water and ore with 5-(p-aminobenzylidene)-thiorhodanine |
| Usage： |
chemistry |
| Keyword： |
Gold, solid phase extraction; spectrophotometry, 5-(p-aminobenzylidene)-thiorhodanine |
| Remarks： |
In this paper, a new chromogenic reagent, 5-(p-aminobenzylidene)-thiorhodanine (ABTR) was synthesized. A high sensitive, selective and rapid method for the determination of gold based on the rapid reaction of gold with ABTR and the solid phase extraction of the colored chelate with a reversed phase polymer-based C18 cartridge has been developed. In the presence of 0.05-0.5 mol L-1 of hydrochloric acid solution and emulsifier-OP medium, ABTR reacts with gold to form a red chelate of a molar ratio 1:3 (gold to ABTR). This chelate was enriched by the solid phase extraction with a polymer-based C18 cartridge and eluted to form the chelate from cartridge with dimethyl formamide (DMF). The ABTR-Au(III)) chelate in 100 mL solution can be concentrated to 1.0 mL, and the enrichment factor of 100 was achieved. In the DMF medium, the molar absorptivity of the chelate is 1.23×105 L.mol-1.cm-1 at 550 nm. Beer's law is obeyed in the range of 0.01- 3 mg mL-1 in the measured solution. The relative standard deviation for eleven replicate samples of 0.5 mg L-1 level is 2.18%. The detection limit, based on the three times of standard deviation is 0.02 mg L-1 in the original sample. This method was applied to the determination of gold in water and ore with good results.
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| Original file： |
No File
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Promulgator Detail |
| Full name: |
lorry |
| Country: |
CN |
| City: |
dalian |
| Company Name: |
Teloon corporation |
| Homepage: |
http:// |
| E-mail: |
reply |
| Phone: |
0411-82811662 |
| Fax: |
86-411-82819667 |
| Company Address: |
remin road,dalian city,liaoning,china |
| Zip/Postal Code: |
116001 |
| Introduction: |
Founded in 1994, Teloon Chemicals Corporation is a professional chemical exporter and producer in China. TeloonChem is located in the beautiful coastal city Dalian, the trade, commercial and financial center of Northeast China. |
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