a minimum of six relicates(至少6次重复) and analyte concentrations (分析物浓度)of 3 to 5 times the estimated method detection limit(预估的方法检出限) have been suggested as suitable for this analysis. 学化学的估计都能把大概的意思猜出来,但整个句子的结构我实在搞不清楚,特别是analyte concentrations of 3 to 5 times the estimated method detection limit 的句子结构是什么样,好像有点乱。谢谢!