CAJ | 학술논문

土壤样品经过硝酸–氢氟酸于130℃加热回流处理后，采用石墨炉原子吸收标准加入法测定半消解样品中镉的含量。以5%氯化铵或0.1%硝酸钯作为化学改进剂，灰化温度为500℃、原子化温度为2000℃。当标准系列吸光度在0.18以内时，镉标准溶液的质量浓度在0~3.0μg／L内与吸光度呈良好的线性，相关系数r=0.9986，方法的检出限为0.02 mg／kg，实际样品测定结果的相对标准偏差为3.93%～5.30%(n=5)。用该法与国标方法对土壤标准样品进行测定，两种方法测定结果一致。该法快速、简便，适用于土壤中镉含量的快速检测。
토양양품경과초산–경불산우130℃가열회류처리후，채용석묵로원자흡수표준가입법측정반소해양품중력적함량。이5%록화안혹0.1%초산파작위화학개진제，회화온도위500℃、원자화온도위2000℃。당표준계렬흡광도재0.18이내시，력표준용액적질량농도재0~3.0μg／L내여흡광도정량호적선성，상관계수r=0.9986，방법적검출한위0.02 mg／kg，실제양품측정결과적상대표준편차위3.93%～5.30%(n=5)。용해법여국표방법대토양표준양품진행측정，량충방법측정결과일치。해법쾌속、간편，괄용우토양중력함량적쾌속검측。
Soil was semi-digested with HNO3–HF by heating reflux at 130℃, the content of cadmium in the sample solution was determined by graphite furnace atomic absorption spectrometry(GFAAS),5%ammonium chloride or 0.1%palladium nitrate was used as matrix modifier. The GFAAS ashing temperature was 500℃and the atomization temperature was 2 000℃. Linear relationship between absorbance and mass concentration of cadmium was obtained in the range of 0–3.0μg/L within the absorbance value less than 0.18, the correlation coefficient was 0.998. The detection limit of the method was 0.02 mg/kg, the relative standard deviation of samples detection results was 3.93%–5.30%(n=5). Three standard soil samples were detected by this method and national standard method, the results of two methods were consistent. The method is rapid and simple,it is suitable for rapid determination of cadium content in soil.