光谱实验室
光譜實驗室
광보실험실
CHINESE JOURNAL OF SPECTROSCOPY LABORATORY
2010年
1期
77-79
,共3页
催化动力学光度法%聚乙二醇%靛红%过硫酸钠%镍%土壤
催化動力學光度法%聚乙二醇%靛紅%過硫痠鈉%鎳%土壤
최화동역학광도법%취을이순%전홍%과류산납%얼%토양
Catalytic Kinetic Spectrophotometry%PEG%Isatin%Sodium Persulfate%Nickel%Soil
基于聚乙二醇(PEG)对Ni~(2+)催化过硫酸钠(Na_2S_2O_8)氧化靛红褪色反应的增敏效果,建立了一种新的测定Ni~(2+)的增敏动力学光度法.确定了最佳的褪色反应条件为:1.0×10~(-3) mol/L靛红2mL、4.0×10~(-3)mol/L Na_2S_2O_8 1.5 mL、PEG400 0.5mL;反应温度为75℃.该方法的线性范围为1.0-10.0μg/25mL,检出限为4.8×10~(-2)μg/mL.催化反应为一级反应,表观活化能为58.17kJ/mol,表观反应常数为2.15×10~(-4)s~(-1).方法用于土壤中镍测定,结果满意.
基于聚乙二醇(PEG)對Ni~(2+)催化過硫痠鈉(Na_2S_2O_8)氧化靛紅褪色反應的增敏效果,建立瞭一種新的測定Ni~(2+)的增敏動力學光度法.確定瞭最佳的褪色反應條件為:1.0×10~(-3) mol/L靛紅2mL、4.0×10~(-3)mol/L Na_2S_2O_8 1.5 mL、PEG400 0.5mL;反應溫度為75℃.該方法的線性範圍為1.0-10.0μg/25mL,檢齣限為4.8×10~(-2)μg/mL.催化反應為一級反應,錶觀活化能為58.17kJ/mol,錶觀反應常數為2.15×10~(-4)s~(-1).方法用于土壤中鎳測定,結果滿意.
기우취을이순(PEG)대Ni~(2+)최화과류산납(Na_2S_2O_8)양화전홍퇴색반응적증민효과,건립료일충신적측정Ni~(2+)적증민동역학광도법.학정료최가적퇴색반응조건위:1.0×10~(-3) mol/L전홍2mL、4.0×10~(-3)mol/L Na_2S_2O_8 1.5 mL、PEG400 0.5mL;반응온도위75℃.해방법적선성범위위1.0-10.0μg/25mL,검출한위4.8×10~(-2)μg/mL.최화반응위일급반응,표관활화능위58.17kJ/mol,표관반응상수위2.15×10~(-4)s~(-1).방법용우토양중얼측정,결과만의.
A catalytic kinetic spectrophotometric method for the determination Ni(Ⅱ)has been developed based on the enhancement of the catalytic effect of Ni(Ⅱ)on the oxidation fading reaction of isatin and sodium persulfate.The optimum reaction conditions were obtained as follows:2mL of 1.0×10~(-3)mol/L isatin violet;1.5mL of 4.0×10~(-3)mol/L sodium persulfate;0.5mL peg;the reaction temperature is 75℃.The linear range is 1.0-10.0μg/25mL and the detection limit is 4.8×10~(-2)μg/mL.The catalytic reaction follows the first-order reaction and the apparent activation energy of the reaction is 58.17kJ/mol and the rate constant is 2.15×10~(-4)s~(-1).This method was used to determine nickel in soil.
