CAJ | 학술논문

采用石墨炉原子吸收光谱法（GF．AAS）测定食品添加剂磷酸氢二铵中的铅含量，并且对样品中铅的线性范围、检测限、回收率和精密度进行了分析[1]。结果表明，在本实验条件下，铅的最低检测限为O．0082μg／g，线性回归方程为y=0．0091x＋0．00619，线性系数为0．9999，样品回收率都在97％以上。在采用同样前处理方法的情况下，样品称样量为2．5g时，10次实验的相对标准偏差为1．01％；样品称样量为0．25g时，10次实验的相对标准偏差为6．39％。样品称样量越大，精密度越高。
채용석묵로원자흡수광보법（GF．AAS）측정식품첨가제린산경이안중적연함량，병차대양품중연적선성범위、검측한、회수솔화정밀도진행료분석[1]。결과표명，재본실험조건하，연적최저검측한위O．0082μg／g，선성회귀방정위y=0．0091x＋0．00619，선성계수위0．9999，양품회수솔도재97％이상。재채용동양전처리방법적정황하，양품칭양량위2．5g시，10차실험적상대표준편차위1．01％；양품칭양량위0．25g시，10차실험적상대표준편차위6．39％。양품칭양량월대，정밀도월고。
The amount of lead in the food additive diammonium hydrogen phosphate was determined by graphite furnace atomic absorption spectrometry. The liner range, the detection limit, recovery rates and degree of precision were also analyzed. The results showed that the detection limit of lead was 0.008 2 μg/g, and the equation of linear regression was y=0.009 lx＋0.006 19. Moreover, the recovery ratio of sample was found to be over 97%. By using same sample preparation method, if fixing the weight of samples as 2.5 g, the relative standard deviation （RSD） for ten experiments was 1.01%. However, if fixing the weight of samples as 0.25 g, the RSD for ten experiments was 6.39%. These results indicated that the degree of precision increases with the sample weight.