Abstract − Analytical Sciences, 22(2), 305 (2006).
Determination of Soluble Bromine in an Extra-High-Pressure Mercury Discharge Lamp by Sodium Hydroxide Decomposition-Suppressed Ion Chromatography
Hiroshi MITSUMATA, Toshio MORI, Tatsuo MAEDA, Yoshiyuki KITA, and Osamu KOHATSU
Lighting Company, Matsushita Electric Industrial Co., Ltd., 1-1, Saiwai-cho, Takatsuki 569-1193, Japan
We have established a simple method for assaying the quantity of soluble bromine in the discharge tubes of an extra-high-pressure mercury discharge lamp. Each discharge tube is destroyed in 5 ml of 10 mM sodium hydroxide, and the recovered sodium hydroxide solution is analyzed by suppressed-ion chromatography using gradient elution. We have clarified that this method can assay less than 1 µg of soluble bromine in a discharge tube.
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