应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2014年
6期
1152-1155
,共4页
土壤%热分解%硫%分光光度法
土壤%熱分解%硫%分光光度法
토양%열분해%류%분광광도법
soil%pyrolysis%sulfur%spectrophotometric
通过高温热解将硫从土壤中分离出来，富集到吸收液，利用可见光分光光度法进行测定。对热分解系统参数进行了优化，优化后的参数为：管式炉温度1000℃，热分解时间35 min，载气流量0.1 L/ min，吸收液浓度0.02 mol/ L，吸收液体积20 mL。利用累积吸收的方法获得方法检出限为0.006 mg/ g，降低了该方法的检出限，提高了检测灵敏度。用于国家标准物质（GBW07425，GBW07454和 GBW（E）070041）及3份实际土壤样品测定，结果与标准值相符，对实际土壤的硫加标回收率92.4%~107.5%。此方法能够快速、准确地进行土壤中硫的测定。
通過高溫熱解將硫從土壤中分離齣來，富集到吸收液，利用可見光分光光度法進行測定。對熱分解繫統參數進行瞭優化，優化後的參數為：管式爐溫度1000℃，熱分解時間35 min，載氣流量0.1 L/ min，吸收液濃度0.02 mol/ L，吸收液體積20 mL。利用纍積吸收的方法穫得方法檢齣限為0.006 mg/ g，降低瞭該方法的檢齣限，提高瞭檢測靈敏度。用于國傢標準物質（GBW07425，GBW07454和 GBW（E）070041）及3份實際土壤樣品測定，結果與標準值相符，對實際土壤的硫加標迴收率92.4%~107.5%。此方法能夠快速、準確地進行土壤中硫的測定。
통과고온열해장류종토양중분리출래，부집도흡수액，이용가견광분광광도법진행측정。대열분해계통삼수진행료우화，우화후적삼수위：관식로온도1000℃，열분해시간35 min，재기류량0.1 L/ min，흡수액농도0.02 mol/ L，흡수액체적20 mL。이용루적흡수적방법획득방법검출한위0.006 mg/ g，강저료해방법적검출한，제고료검측령민도。용우국가표준물질（GBW07425，GBW07454화 GBW（E）070041）급3빈실제토양양품측정，결과여표준치상부，대실제토양적류가표회수솔92.4%~107.5%。차방법능구쾌속、준학지진행토양중류적측정。
Sulfur was separated from soil sample by pyrolysis,and was subsequently determined with visi-ble spectrophotometric method. The optimal conditions for pyrolysis system are 1 000 ℃ for pyrolysis tem-perature,35 min for pyrolysis time,0. 1 L/ min for air flow,0. 02 mol/ L and 20 mL for concentration and the volume of absorption solution. The method improve sensitivity for sulfur,and the limits of detection is up to 0. 006 mg / g. The method was successfully applied to the determination of sulfur in soil. The results of recovery tests ranged 92. 4% ~ 107. 5% . The accuracy of method has been verified by using national standard substance(GBW07425,GBW07454 and GBW(E)070041).
