Abstract: [Objective] To clarify strontium concentration and isotopic composition characteristics of jujube and its environment of producing area in Ruoqiang,Xinjiang and determine the feasibility of using Sr isotope to trace the geographical origin of Ruoqiang grey jujube.[Method] Strontium concentration and isotopic composition characteristics were respectively measured by inductively coupled plasma mass spectrometry (ICP -MS) and thermal ionization mass spectrometer (TIMS),which included jujube,soil and irrigation water.[Result] The sample jujube collected from Ruoqiang Tieganlike Township had higher Sr concentration (5.11 mg/kg) and lower Sr isotope ratios (0.711,329).By contrast,The sample jujube collected from Ruoqiang Washixia township had lower Sr concentration and higher Sr isotope ratios,ranging from 3.14 mg/kg to 4.26 mg/kg(averages 3.78 mg/kg),and from 0.712,643 to 0.713,084 (averages 0.712,897),respectively.Compared with 2.5 mg/kg of Chinese biological standard strontium content,Ruoqiang jujube had higher Sr concentrations (4.67 mg/kg),but the strontium content (2 mg/kg) was relatively low in Xinzheng Henan jujube.[Conclusion] Based on the strontium content and its isotopic composition,the Ruoqiang grey jujube and Xinzheng grey jujube can be preliminarily distinguished,and the strontium isotope can be used as one of the indexes for tracing the geographical origin of Ruoqiang jujube.

摘要： [目的]通过对若羌灰枣及其产地环境锶含量与同位素的组成特征进行测定,明确运用锶同位素溯源若羌灰枣产地的可行性.[方法]采集若羌县和36团灰枣、枣园土壤和灌溉水,运用电感耦合等离子体质谱仪(ICP-MS)和热电离质谱仪(TIMS),分别测定锶含量及同位素组成特征.[结果]若羌县铁千里克乡灰枣具有较高锶含量(5.11 mg/kg)和较低的锶同位素比值(0.711 329),而若羌县瓦石峡乡灰枣具有较低的锶含量及较高的锶同位素比值,其锶含量变化范围在3.14～4.26 mg/kg,均值为3.78 mg/kg;锶同位素比值的变化范围在0.712643 ～0.713 084,平均值为0.712 897.与中国生物标准锶含量的2.5 mg/kg相比,若羌灰枣锶含量(4.67mg/kg)较高,而河南新郑灰枣锶含量(2.00 mg/kg)相对较低.[结论]根据灰枣的锶含量及其同位素组成特征,可区分若羌灰枣和新郑灰枣,运用锶同位素可作为若羌灰枣产地溯源的指标之一.