食品安全质量检测学报
食品安全質量檢測學報
식품안전질량검측학보
FOOD SAFETY AND QUALITY DETECTION TECHNOLOGY
2015年
5期
1597-1602
,共6页
叶佩琳%胡银凤%朱宏斌%姚射月%岳鹏翔
葉珮琳%鬍銀鳳%硃宏斌%姚射月%嶽鵬翔
협패림%호은봉%주굉빈%요사월%악붕상
基体改进剂%石墨炉原子吸收%速溶茶%铅%镉%铬?
基體改進劑%石墨爐原子吸收%速溶茶%鉛%鎘%鉻?
기체개진제%석묵로원자흡수%속용다%연%력%락?
matrix?modifier%graphite?furnace?atomic?absorption%instant?tea%lead%cadmium%chromium?
目的：以微波消解为前处理方式,建立一种石墨炉原子吸收光谱法测定速溶茶中微量重金属铅、铬、镉的实验方法。方法采用高压密闭微波消解仪对速溶茶进行消解,加入硝酸铵、硝酸钯等基体改进剂消除样品干扰,并优化仪器条件进行石墨炉原子法测定。结果测定速溶茶中铅、铬、镉的最佳基体改进剂分别为硝酸铵-硝酸钯混合基体改进剂、硝酸钯基体改进剂、硝酸铵-硝酸钯混合基体改进剂。在最佳实验条件下,铅、铬、镉的线性范围分别为0~80μg/L、0~40μg/L、0~2μg/L,检出限分别为0.3681μg/L、0.1268μg/L、0.0076μg/L,铅、镉、铬的标准曲线相关系数分别为0.9990、0.9978和0.9992,回收率均在98.64%~101.9%之间,样品测定相对标准偏差均小于5%。结论该方法简便、快速、准确,可作为速溶茶中铅、镉、铬快捷、可靠的检测方法。
目的：以微波消解為前處理方式,建立一種石墨爐原子吸收光譜法測定速溶茶中微量重金屬鉛、鉻、鎘的實驗方法。方法採用高壓密閉微波消解儀對速溶茶進行消解,加入硝痠銨、硝痠鈀等基體改進劑消除樣品榦擾,併優化儀器條件進行石墨爐原子法測定。結果測定速溶茶中鉛、鉻、鎘的最佳基體改進劑分彆為硝痠銨-硝痠鈀混閤基體改進劑、硝痠鈀基體改進劑、硝痠銨-硝痠鈀混閤基體改進劑。在最佳實驗條件下,鉛、鉻、鎘的線性範圍分彆為0~80μg/L、0~40μg/L、0~2μg/L,檢齣限分彆為0.3681μg/L、0.1268μg/L、0.0076μg/L,鉛、鎘、鉻的標準麯線相關繫數分彆為0.9990、0.9978和0.9992,迴收率均在98.64%~101.9%之間,樣品測定相對標準偏差均小于5%。結論該方法簡便、快速、準確,可作為速溶茶中鉛、鎘、鉻快捷、可靠的檢測方法。
목적：이미파소해위전처리방식,건립일충석묵로원자흡수광보법측정속용다중미량중금속연、락、력적실험방법。방법채용고압밀폐미파소해의대속용다진행소해,가입초산안、초산파등기체개진제소제양품간우,병우화의기조건진행석묵로원자법측정。결과측정속용다중연、락、력적최가기체개진제분별위초산안-초산파혼합기체개진제、초산파기체개진제、초산안-초산파혼합기체개진제。재최가실험조건하,연、락、력적선성범위분별위0~80μg/L、0~40μg/L、0~2μg/L,검출한분별위0.3681μg/L、0.1268μg/L、0.0076μg/L,연、력、락적표준곡선상관계수분별위0.9990、0.9978화0.9992,회수솔균재98.64%~101.9%지간,양품측정상대표준편차균소우5%。결론해방법간편、쾌속、준학,가작위속용다중연、력、락쾌첩、가고적검측방법。
Objective To establish a method for the determination of heavy metal lead, chromium and cadmium in instant tea by graphite furnace atomic absorption spectrometry (GFAAS) with microwave digestion. Methods Solid instant tea powder was slaked in high pressure sealed microwave digestion instrument, with adding ammonium nitrate, nitric acid matrix modifier for eliminating the sample disturbance. Instrument conditions were optimized for graphite furnace atomic spectrometry. Results The optimal matrix modifiers for the determination of lead, chromium, cadmium in instant tea were ammonium nitrate and palladium nitrate mixed matrix modifier, palladium nitrate as matrix modifier, ammonium nitrate and palladium nitrate mixed matrix modifier, respectively. Under the optimum experimental conditions, the linear ranges of lead, chromium and cadmium were 0~80 μg/L, 0~40 μg/L, and 0~2 μg/L and their detection limits were 0.3681 μg/L, 0.1268 μg/L, and 0.0076 μg/L. The correlation coefficients of lead, cadmium and chromium standard curve were 0.9990, 0.9978 and 0.9992, respectively. The recoveries rate were between 98.64%~101.9% and the relative standard deviation was less than 5%. Conclusion This method is simple, rapid and accurate, which can be used as a fast and reliable method for the determination of the lead, cadmium and chromium in instant tea.
