淮北师范大学学报：自然科学版
淮北師範大學學報：自然科學版
회북사범대학학보：자연과학판
Journal of Huaibei Coal Industry Teachers College(Natural Science edition)
2012年
1期
49-52
,共4页
双波长%催化光度法%甲基绿%藏红T
雙波長%催化光度法%甲基綠%藏紅T
쌍파장%최화광도법%갑기록%장홍T
manganese%dual - wavelength%catalytic spectrophotometry%methyl green%satranine T
研究pH4.8的HAc-NaAe缓冲体系中。用Mn（Ⅱ）催化高碘酸钾氧化藏红T和甲基绿褪色的指示反应，通过测量波长在520nm和632nm条件下。催化体系与非催化体系吸光度的变化和Mn（Ⅱ）浓度的线性关系，建立双波长双指示剂催化动力学光度法测定痕量锰的又一新方法。方法的线性范围是0.0100μg／25mL-0.0900μg／25mL，检出限是3.0×10^-10g／mL。该方法操作简单、灵敏度高、选择性好，用于茶叶中痕量锰的测定，能达到满意的结果。
研究pH4.8的HAc-NaAe緩遲體繫中。用Mn（Ⅱ）催化高碘痠鉀氧化藏紅T和甲基綠褪色的指示反應，通過測量波長在520nm和632nm條件下。催化體繫與非催化體繫吸光度的變化和Mn（Ⅱ）濃度的線性關繫，建立雙波長雙指示劑催化動力學光度法測定痕量錳的又一新方法。方法的線性範圍是0.0100μg／25mL-0.0900μg／25mL，檢齣限是3.0×10^-10g／mL。該方法操作簡單、靈敏度高、選擇性好，用于茶葉中痕量錳的測定，能達到滿意的結果。
연구pH4.8적HAc-NaAe완충체계중。용Mn（Ⅱ）최화고전산갑양화장홍T화갑기록퇴색적지시반응，통과측량파장재520nm화632nm조건하。최화체계여비최화체계흡광도적변화화Mn（Ⅱ）농도적선성관계，건립쌍파장쌍지시제최화동역학광도법측정흔량맹적우일신방법。방법적선성범위시0.0100μg／25mL-0.0900μg／25mL，검출한시3.0×10^-10g／mL。해방법조작간단、령민도고、선택성호，용우다협중흔량맹적측정，능체도만의적결과。
Abstract： A new dual-wavelength and dual-indicator catalytic kinetic spectrophotometric method for the determination of trace manganese（Ⅱ） is studied. The method is based on the catalyzing effect of manganese on oxidate discoloring reaction of safranineT and methyl green by KIO4 in the buffer media of HAc- NaAc at pH 4.8. The absorbances in catalytic and uncatalytic systems were measured at 520 nm and 632 nm. The linear range of detemination of manganese（Ⅱ） is 0.0100 μg/25mL-0.090 0μg/25mL. The detection limit is 3.0 × 10^-10 g/mL. The method has been used to the determination of trace manganese in tea and the results with satisfactory.
