中国井矿盐
中國井礦鹽
중국정광염
CHINA WELL AND ROCK SALT
2013年
5期
38-42
,共5页
背景吸收%分子吸收%磷酸氢钙%Pb干扰%消除
揹景吸收%分子吸收%燐痠氫鈣%Pb榦擾%消除
배경흡수%분자흡수%린산경개%Pb간우%소제
Background absorption%Molecular absorption%lacium hydrogen phosphate%pbinterference%elimination
空气要乙炔火焰原子吸收分光光度法测定饲料磷酸氢钙中的Pb存在背景吸收干扰，背景干扰大小与分析测试条件密切相关，确定了背景吸收干扰主要是由水溶液中大量的Ca2+、Mg2+和H3PO4引起，探讨了非吸收线（Pb282.3nm、Pb280.1nm）和连续光源(氘灯)扣除背景吸收的情况；提出以实现标准溶液与待测样品溶液“基体一致”的方法，避免了测定背景吸收。此法测定饲料磷酸氢钙样品中的Pb，操作简便快速，适宜限量测定。
空氣要乙炔火燄原子吸收分光光度法測定飼料燐痠氫鈣中的Pb存在揹景吸收榦擾，揹景榦擾大小與分析測試條件密切相關，確定瞭揹景吸收榦擾主要是由水溶液中大量的Ca2+、Mg2+和H3PO4引起，探討瞭非吸收線（Pb282.3nm、Pb280.1nm）和連續光源(氘燈)釦除揹景吸收的情況；提齣以實現標準溶液與待測樣品溶液“基體一緻”的方法，避免瞭測定揹景吸收。此法測定飼料燐痠氫鈣樣品中的Pb，操作簡便快速，適宜限量測定。
공기요을결화염원자흡수분광광도법측정사료린산경개중적Pb존재배경흡수간우，배경간우대소여분석측시조건밀절상관，학정료배경흡수간우주요시유수용액중대량적Ca2+、Mg2+화H3PO4인기，탐토료비흡수선（Pb282.3nm、Pb280.1nm）화련속광원(도등)구제배경흡수적정황；제출이실현표준용액여대측양품용액“기체일치”적방법，피면료측정배경흡수。차법측정사료린산경개양품중적Pb，조작간편쾌속，괄의한량측정。
There is background absorption interference in the determination of Pb in DCP feed with air-acetylene flame atomic absorption spectrophotometry. The strength of background interference is closely related to the anlaysis condition, and this paper ensures that the background absorption interference is mainly caused by Ca2+,Mg2+and H3PO4 in water solution.This paper discusses the cases of non-absorption line (Pb282.3nm, Pb280.1nm) and continuous light source (deuterium lamp) offseting background absorption and put forwards the way to achieve the standard solution and the sample solution "matrix consistent" which avoids the determination of background absorption. This method is easy and fast to carry out Pb determination in the DCP feed and it is fit for limit determination.
