农业资源与环境学报
農業資源與環境學報
농업자원여배경학보
Journal of Agricultural Resources and Environment
2014年
4期
388-392
,共5页
GC-ECD%土壤%炔草酯%残留%消解动态
GC-ECD%土壤%炔草酯%殘留%消解動態
GC-ECD%토양%결초지%잔류%소해동태
GC-ECD%soil%clodinafop-propargyl%residue%degradation dynamic
采用乙腈振荡提取，GC-ECD测定，建立了小麦田土壤中炔草酯残留量的测定方法。在0.01~2.0 mg·kg-1质量浓度范围内，气相色谱峰面积与炔草酯质量浓度呈良好的线性关系，相关系数为R2=0.9994。外标法定量，土壤中添加炔草酯质量分数分别为0.01、0.1 mg·kg-1和0.5 mg·kg-1，平均回收率分别为95.91豫、89.50豫和75.35%，相对标准偏差分别为2.66豫、7.64豫和4.23%，最低检出浓度为0.01 mg·kg-1。检测结果表明，该测定方法前处理简便快速、成本低、结果准确，能够满足土壤中炔草酯残留量的分析要求。在山东和湖南开展的2年两地土壤田间试验结果表明，炔草酯在土壤中30 d的消解率均超过99%，理论半衰期为2.7~3.9 d，属于易降解农药。
採用乙腈振盪提取，GC-ECD測定，建立瞭小麥田土壤中炔草酯殘留量的測定方法。在0.01~2.0 mg·kg-1質量濃度範圍內，氣相色譜峰麵積與炔草酯質量濃度呈良好的線性關繫，相關繫數為R2=0.9994。外標法定量，土壤中添加炔草酯質量分數分彆為0.01、0.1 mg·kg-1和0.5 mg·kg-1，平均迴收率分彆為95.91豫、89.50豫和75.35%，相對標準偏差分彆為2.66豫、7.64豫和4.23%，最低檢齣濃度為0.01 mg·kg-1。檢測結果錶明，該測定方法前處理簡便快速、成本低、結果準確，能夠滿足土壤中炔草酯殘留量的分析要求。在山東和湖南開展的2年兩地土壤田間試驗結果錶明，炔草酯在土壤中30 d的消解率均超過99%，理論半衰期為2.7~3.9 d，屬于易降解農藥。
채용을정진탕제취，GC-ECD측정，건립료소맥전토양중결초지잔류량적측정방법。재0.01~2.0 mg·kg-1질량농도범위내，기상색보봉면적여결초지질량농도정량호적선성관계，상관계수위R2=0.9994。외표법정량，토양중첨가결초지질량분수분별위0.01、0.1 mg·kg-1화0.5 mg·kg-1，평균회수솔분별위95.91예、89.50예화75.35%，상대표준편차분별위2.66예、7.64예화4.23%，최저검출농도위0.01 mg·kg-1。검측결과표명，해측정방법전처리간편쾌속、성본저、결과준학，능구만족토양중결초지잔류량적분석요구。재산동화호남개전적2년량지토양전간시험결과표명，결초지재토양중30 d적소해솔균초과99%，이론반쇠기위2.7~3.9 d，속우역강해농약。
GC-ECD method was developed for the determination of clodinafop-propargyl in wheat soil.The soil samples were extracted with acetonitrile.The linearity of the GC-ECD method was satisfied(R2=0.999 4)in the concentration range of 0.01~2.0 mg·kg-1. The average recov-eries in soil were 95.91%, 89.50%and 75.35%, respectively, the coefficients of variation were 2.66%, 7.64%和4.23%, by adding clodi-nafop-propargyl into wheat soil at three concentration levels(0.01, 0.1, 0.5 mg·kg-1).The limit of quantification in soil was 0.01 mg·kg-1. The detection results showed that GC-ECD method was economic and accurate whose pretreatment was simple and rapid. Two years field experi-ments in Shandong Province and Hunan Province revealed that the residue of degradation dynamics in 30 d were more than 99%, and the half-life of clodinafop-propargyl were 2.7~3.9 d.
