最低检测浓度

当采集空气30L时，检出限为0.01mgm3，最低检测浓度为0.03mgm3，适用于环境空气及室内空气中甲醛的测定。

When the formaldehyde in 30L air is absorbed by absorption solution , the detection limit is 0.01mg / m3 , and the minimum detectable concentration is 0.03mg/m3.This method is fit for determination of formaldehyde in ambient atmosphere and indoor air .

此法灵敏度高，元素硫最低检测浓度为1.6×10-3μg/ml；元素硫浓度在0～0.05μg/ml范围内与紫外光吸收值存在良好线性关系，方法精密度和准确度好。

This measurement method possesses high sensitivity , good precision and accuracy , the minimum detectable concentration of elemental sulfur is 1.6 × 10 ~ - 3 μ g / ml , and the linear range of elemental sulfur is 0 to 0.05 μ g / ml.

最低检测浓度50ng／ml。

The minimum detective concentration was 50 ng / ml.

最低检测浓度为5.0μg/ml，样品加标回收率为101.8%～107.5%，相对标准偏差（RSD）≤3.3%。

The detection limit was 5.0 μ g / ml. The recovery rates of a standard material added-water samples were 101.8 % ~ 107.5 % . The relative standard deviation was not more than 3.3 % .

该方法BHC、DDT最低检测浓度为0.2～4.0μg/kg，在水产品中的回收率为85.3%～94.2%。

A number of aquatic products were analyzed , and the minimun of detection concentration 0.2 ~ 4.0 μ g / kg . The recoveries rate is 85.3 % ~ 94.2 % .

结果：该方法回收率为99.95%～101.6%，RSD≤8.5%，在兔血中最低检测浓度1.14μg·mL~（-1）。

Results : The recovery rate of this method was 99 . 95 % - 101 . 6 % , RSD ≤ 8 . 5 % , the lowest detection concentration was 1 . 14 μ g · mL-1 in rabbit 's serum .

方法的最小检出量为1.3ng，病氰硝在烟草及土壤中的最低检测浓度均为0.08mg/kg。

The minimum amount of detection was 1.3 ng . The detectable limit of concentration was 0.08mg/kg in tobacco and soil .

结果：在4min内可完成枸橼酸昔多芬与内标物的分离和测定，该法最低检测浓度为5μg/ml；

Results : The determination could be completed within 4 min and the minimum concentration of detection was 5 μ g / ml.

该方法测定准确度较高，最低检测浓度0.1mg/kg，可较好地应用于代森锰锌残留测定。

The method is characterized by high accuracy with 0.1 mg / kg minimum detectable level of mancozeb in samples . It can be satisfactorily applied for determination of mancozeb residue .

在270nm处紫外分光光度法的最低检测浓度为18.0μg/ml；荧光法为0.60μg/ml。

The lowest concentration for detection is 18 μ g / ml at 270 nm for ultravio-let spectrophotometry and 0.6 μ g / ml for fluorometry .

用配有NPD的气相色谱仪、DB1301毛细管柱测定稻田土壤及稻米中农美利的残留量，最低检测浓度为0.01mg/kg、平均回收率为80.4%～99.8%，变异系数为6.3%～11.7%，均达到残留分析的要求。

Using gas chromatograph equipped with NPD and DB-1301 capillary column , the detection limit is 0.01mg / kg , the mean recovery is 80.4 % ~ 99.8 % , and the coefficient of variation is 6.3 % ~ 11.7 % . The approach has higher sensitivity and less interference .

利用顶空气相色谱法测定利巴韦林中甲醇、乙醇残留量，方法的回收率为930%～980%，甲醇的最低检测浓度为136μg/g，乙醇的最低检测浓度为70μg/g，相对标准偏差<10%。

Residual methanol and ethanol in ribavirin were determined by using headspace gas chromatography . The results showed that the recovery was 93.0 % ~ 98.0 % with detection limit of 13.6 μ g / g and relative standard deviation of below 10 % .

利用气相色谱法同时测定了参叶茶中六六六和滴滴涕共8种异构体的残留量，方法回收率为78.0%～100.0%，最低检测浓度为<1.5ng/g，相对标准偏差<10.0%。

A method for quantitative analysis of BHC and DDT residue in ginseng leaf tea by GC was set up . The results showed that the recovery is 78.0 % ~ 100.0 % with detection limit of 1.5 ng / g and relative standard deviation of below 10 0 % .

测定了这些元素的主要分析线的检出限、最低检测质量浓度，加标回收率为94.5%～107%，RSD为0.52%～2.31%。

We determined these metal elementary detection limits of mostly analysis line . The recoveries were in the range of 94 . 5 % - 107 % . The relative standard deviations were in the range of 0 . 52 % - 2 . 3 1 % .