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A new flow-injection chemiluminescence method for the determination of trace amounts of sulfide was developed. It is based on the enhancement of sulfide on the chemiluminescence reaction of calcein with potassium ferricyanide. The relationship between the increased chemiluminescence intensity and the concentration of sulfide is linear in the range of 3.0 × 10-8 - 2.0 × 10-6g/ml. The detection limit...
The interference of the chloride ion (Cl-) on the standard method for chemical oxygen demand (COD) determination proposed by American Publican Health Association (APHA) cannot be ignored, especially for samples with high salinity. Increasing the ratio of HgSO4:Cl- and adding some masking agents such as AgNO3, Cr3+, Al3+ are all good modifications of the standard method to eliminate the Cl- interference...
A novel flow injection chemiluminescence (FI-CL) system combined with on-line solid phase extraction (SPE) has been developed for the determination of trace copper in natural waters. The chemiluminescence (CL) is obtained by oxidation of novel rhodanine derivative by potassium permanganate in hydrochloric acid in the presence of copper. C18-modified silica gel was packed into the glass tube to serve...
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