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A microbial sensor, based on an immobilized mixed the yeast Arxula adeninivorans with a Clark-type oxygen electrode, has been developed for the measurement of Biochemical Oxygen Demand(BOD) in high salt wastewater. Arxula is immobilized in the Polyvinyl Alcohol (PVA). Arxula is salt tolerant, it can give a stable signal up to 100g/L NaCl in sample. The influence of pH, temperature and heavy metal...
A new simple, reliable, rapid and reproducible carbon paste selective electrode for azide ions based on a new Schiff' base complex of iron (III) was prepared and fully characterized in terms of composition, usable pH range and response time. The azide selective electrode exhibits fast, stable and Nernstian response over the concentration range of 1.0 ?? 10-6 to 5.0 ?? 10-2 M at 25.0 ?? 1.0??C in the...
A novel spectrophotometric method for the determination of trace amount of Chromium (VI) by tri-hydroxyl phenylfluorone (THPF) in the microemulsion medium has been developed. All the variables were studied in order to optimize the reaction conditions. At pH = 5.82, Cr(VI) reacts with THPF to form a 1 : 2 complex, which has a maximum absorption at 560 nm with a molar absorptivity of 8.99times104 L/mol/cm...
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