中国调味品
中國調味品
중국조미품
CHINESE CONDIMENT
2014年
12期
101-104
,共4页
苯胺蓝%阻抑反应%动力学光度法%碘
苯胺藍%阻抑反應%動力學光度法%碘
분알람%조억반응%동역학광도법%전
aniline blue%inhibition reaction%kinetic spectrophotometry%iodine
在硫酸介质中,痕量碘离子对溴酸钾氧化苯胺蓝褪色反应有显著的阻抑作用,据此建立阻抑动力学光度法测定微量碘的新方法。研究了褪色反应的动力学参数包括酸度、试剂的用量、温度和时间等,确定了最优化的反应条件。方法的线性范围为8~48μg/L,检测限为1.3×10-6 g/L。该方法操作简便、灵敏度高、选择性好,用于食盐中微量碘的测定,取得满意的结果。
在硫痠介質中,痕量碘離子對溴痠鉀氧化苯胺藍褪色反應有顯著的阻抑作用,據此建立阻抑動力學光度法測定微量碘的新方法。研究瞭褪色反應的動力學參數包括痠度、試劑的用量、溫度和時間等,確定瞭最優化的反應條件。方法的線性範圍為8~48μg/L,檢測限為1.3×10-6 g/L。該方法操作簡便、靈敏度高、選擇性好,用于食鹽中微量碘的測定,取得滿意的結果。
재류산개질중,흔량전리자대추산갑양화분알람퇴색반응유현저적조억작용,거차건립조억동역학광도법측정미량전적신방법。연구료퇴색반응적동역학삼수포괄산도、시제적용량、온도화시간등,학정료최우화적반응조건。방법적선성범위위8~48μg/L,검측한위1.3×10-6 g/L。해방법조작간편、령민도고、선택성호,용우식염중미량전적측정,취득만의적결과。
A new inhibition kinetic spectrophotometric method for the determination of trace iodine in edible salt is proposed.This method is based on the inhibition effect of iodide on the oxidation of aniline blue by potassium bromate in the presence of sulfuric acid.The effects of reaction parameters such as acidity,reagent consumption,temperature and time are investigated and optimized.Under the optimum conditions,the calibration curve is linear in the range of 8~48μg/L with the detection limit of 1.3×10-6 g/L.The developed method is simple,sensitive and selective,which can be applied for the determination of trace iodine in edible salt with satisfactory results.
