Determination of Bromine and Chlorine in Gasoline

Determination of Halogen Elements in Volatile Organohalogen Compounds by the Wickbold Combustion Pretreatment Method and Ion Chromatography

“…Organohalogen compounds are used as surface coating reagents, flame retardants, fire-proofing agents, and insecticides in various polymer and fine chemical fields. Although many analysis methods [1][2][3][4][5][6][7][8][9][10][11][12] of halogen elements in organohalogen compounds have been studied for a long time, it is very difficult to quantitatively determine the amount of halogen elements because of their volatile nature.…”

“…The Wickbold combustion apparatus V5 : (1) shell oven, (2) solid state burner (3) burning chamber and cooling condenser (length:30 cm), (4) absorption tube (5) flask for decombustion solution, (6) rinsing device,(7) solution tank…”

Sodium biphenyl method for determination of covalently bound fluorine in organic compounds and biological materials

“…In this context, determination of halogens following rapid reductive cleavage of the covalently bound halogens with sodium naphthalene (9) and sodium biphenyl (10,11) reagents seemed promising. This approach was explored several years ago by this author for the determination of organic fluorine in blood plasma (3) and was found to be unsuitable because of (a) the low levels of organic fluorine in normal plasma, (b) the relatively high fluorine blank of the sodium biphenyl reagent that was then used, and (c) the uncertainties regarding quantitative extraction techniques needed for concentrating the organic fluorine to overcome the reagent blank.…”

Determination of Trace Amounts of Chlorine in Naphtha

“…Two general procedures exist for converting organic chlorine to chloride ion: oxidation of the entire sample (1, 2), and reduction with sodium in various media (5, [14][15][16]18). Most of the procedures require excessive reaction time for the more refractory chlorine compounds or cannot accommodate large enough samples.…”