Determination of Tetraethyl Lead in Gasoline by Flame Photometry

The determination of magnesium in biological materials by flame photometry.

A method is described for the measurement of magnesium in biological materials and has been applied to the Unicam flame spectrophotometer SP 900. Samples were diluted in 10 mM strontium ethylenedinitrolo tetraacetate (EDTASr), 10 mM potassium carbonate, giving final magnesium concentrations of about 0.1 to 0.2 mM. The EDTASr almost eliminated the depression of magnesium emission by interfering ...

The determination of calcium in biological fluids by flame photometry.

The use of flame photometers has greatly simplified and expedited the estimation of sodium and potassium. Calcium is one of the elements which it is possible to determine by flame photometry, but little advantage has been taken of this fact in biological work for a number of reasons. The concentration of calcium in extracellular fluids is usually less than that of potassium ; a given quantity o...

The determination of serum bicarbonate by flame photometry.

At the present time, the applicability of the flame photometer to the clinical laboratory for determination of the cations sodium, potassium, and calcium in biological fluids has been demonstrated by numerous investigators (l-7). The determination of magnesium in blood serum and plasma by flame photometry has also been described (2, 8). However, analysis of physiologically significant anions in...

Determination of lead and cadmium in water samples by cloud point extraction prior to flame atomic absorption spectrometry determination

Pb and Cd in water samples were determined by cloud point extraction (CPE) with sodiumdiethyldithiocarbamate (DDTC) as the chelating agent and octylphenoxypolyethanl (Triton X-114) asthe surfactant prior to flame atomic absorption spectrometry (FAAS) determination. The main factorsof affecting the extraction and detection processes were optimized. The preconcentration of 10 mL ofstandard soluti...

Automated atomic absorption determination of lead in gasoline