贵金属
貴金屬
귀금속
PRECIOUS METALS
2009年
4期
33-36,43
,共5页
金娅秋%朱利亚%安中庆%陈登权%管有祥
金婭鞦%硃利亞%安中慶%陳登權%管有祥
금아추%주리아%안중경%진등권%관유상
分析化学%电位滴定法%银、铜、镍、锰合金%锰
分析化學%電位滴定法%銀、銅、鎳、錳閤金%錳
분석화학%전위적정법%은、동、얼、맹합금%맹
analytical chemistry%potentiometric titration%silver,copper,nickel and manganese alloys%manganiese
建立了高锰酸钾电位滴定测定锰的方法,研究了不同合金中测定锰的条件.结果表明:在焦磷酸钠介质中,采用Pt指示电极和Ag参比电极指示滴定终点,用KMnO_4溶液滴定Mn(Ⅱ)为Mn(Ⅲ),测定6.00～30.00 mg Mn,相对误差≤±0.33%,加标准回收率在99.60%～100.40%.方法准确度高,重现性和选择性好,操作简便,终点敏锐,已应用于锰质量分数为7%～98%的银、铜、镍、锰等合金中锰的测定,结果满意.
建立瞭高錳痠鉀電位滴定測定錳的方法,研究瞭不同閤金中測定錳的條件.結果錶明:在焦燐痠鈉介質中,採用Pt指示電極和Ag參比電極指示滴定終點,用KMnO_4溶液滴定Mn(Ⅱ)為Mn(Ⅲ),測定6.00～30.00 mg Mn,相對誤差≤±0.33%,加標準迴收率在99.60%～100.40%.方法準確度高,重現性和選擇性好,操作簡便,終點敏銳,已應用于錳質量分數為7%～98%的銀、銅、鎳、錳等閤金中錳的測定,結果滿意.
건립료고맹산갑전위적정측정맹적방법,연구료불동합금중측정맹적조건.결과표명:재초린산납개질중,채용Pt지시전겁화Ag삼비전겁지시적정종점,용KMnO_4용액적정Mn(Ⅱ)위Mn(Ⅲ),측정6.00～30.00 mg Mn,상대오차≤±0.33%,가표준회수솔재99.60%～100.40%.방법준학도고,중현성화선택성호,조작간편,종점민예,이응용우맹질량분수위7%～98%적은、동、얼、맹등합금중맹적측정,결과만의.
A potentiometric titration method for determination of manganese using potassium permanganate as a titrant was proposed. The conditions to determine manganese were studied. The results indicated that the relative error is ≤±0.33% for determining 6.00～30.00 mg Mn and the recovery of Mn in the samples with the addition of standard Mn is 99.60%～100.40% by using Pt as an indicator electrode and Ag a reference electrode to show the titration end point and by KMnO_4 solution to titrate Mn(Ⅱ) to Mn(Ⅲ) in sodium pyrophosphate medium. The proposed method has high accuracy,good precision and selectivity,convenient operation and sensitive end point. It has been applied to determine Mn in Ag,Cu,Ni and Mn alloys containing Mn of 7%～98% with satisfactory results.
