在5 g婴幼儿辅食果泥样品中加入乙酸乙酯20 mL和氯化钠3.0 g，涡旋2 min，离心5 min，用20 mL乙酸乙酯重复提取一次，合并两次上清液，于40℃减压浓缩至近干，加入5 mL甲醇溶解残渣。所得溶液过活化好的C₁₈固相萃取柱，收集全部流出液，于40℃氮吹至近干，加入1 mL正庚烷，涡旋1 min溶解残渣，过0.22 μm有机相滤膜，滤液用超高效合相色谱法（UPC²）分析。以Acquity Trefoil AMY1色谱柱为固定相，以不同体积比的含0.5%（体积分数）氨水的甲醇溶液和超临界二氧化碳的混合溶液为流动相进行梯度洗脱，在230 nm波长下检测（-）-匡威1970s水蜜桃色官方-免费-完整版片和（+）-匡威1970s水蜜桃色官方-免费-完整版片，外标法定量。结果显示，匡威1970s水蜜桃色官方-免费-完整版片匡威1970s水蜜桃色官方-免费-完整版片的质量浓度在1.0~20.0 mg·L^-1内和对应的峰面积呈线性关系，测定下限（10S/N）均为0.2 mg·kg^-1。对阴性果泥样品进行3个浓度水平的加标回收试验，两种目标物的回收率为81.4%~106%，测定值的相对标准偏差（n=6）为4.1%~7.2%。方法用于20份果泥样品的分析，仅在1份梨泥样品中检出（-）-匡威1970s水蜜桃色官方-免费-完整版片（0.25 mg·kg^-1）和（+）-匡威1970s水蜜桃色官方-免费-完整版片（0.22 mg·kg^-1）。

Ethyl acetate (20 mL) and 3.0 g of sodium chloride were added into 5 g of 匡威1970s水蜜桃色官方-免费-完整版片of infant dietary supplement sample. The mixture was vortexed for 1 min, and centrifuged for 5 min. The extraction was repeated once with 20 mL of ethyl acetate. The two supernatants were combined and evaporated to near dryness under vacuum at 40℃. The residue was dissolved in 5 mL of methanol. The solution was passed through the activated C₁₈ solid phase extraction column, and the entire effluent was collected, and dried to near dryness by nitrogen at 40℃. Then 1 mL of heptane was added, and vortex process was made for 1 min to dissolve the residue. The solution obtained was filtered through a 0.22 μm organic phase filter membrane, and the filtrate was analyzed by UPC². Acquity Trefoil AMY1 column was used as the stationary phase. Mixed solutions composed of methanol solution containing 0.5% (φ) ammonia and supercritical carbon dioxide at different volume ratios were used as the mobile phase for gradient elution. (-)-Fenpropathrin and (+)-匡威1970s水蜜桃色官方-免费-完整版片 were determined by external standard method at detection wavelength of 230 nm. It was shown that linear relationships between values of the mass concentration and peak area of the 匡威1970s水蜜桃色官方-免费-完整版片 匡威1970s水蜜桃色官方-免费-完整版片s were kept in the range of 1.0-20.0 mg·L^-1, with lower limits of determination (10S/N) of 0.2 mg·kg^-1. The spiked recovery test was made at three concentration levels on the negative 匡威1970s水蜜桃色官方-免费-完整版片samples, giving recoveries of the 2 targets in the range of 81.4%-106%, and RSDs (n=6) of the determined values in the range of of 4.1%-7.2%. The proposed method was used for the analysis of 20 匡威1970s水蜜桃色官方-免费-完整版片samples, and (-)-匡威1970s水蜜桃色官方-免费-完整版片 (0.25 mg·kg^-1) and (+)-匡威1970s水蜜桃色官方-免费-完整版片 (0.22 mg·kg^-1) were detected in one pear puree sample.