The minimum concentration at which the analyte can reliably be detected is established.

这样就确立了能够可靠检测的待分析物的最低浓度。

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The minimum concentration at which the analyte can reliably be quantified is established.

这样就确立了能够可靠地定量待分析物的最低浓度。

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The LEL of a gas is the minimum concentration of that gas in air at which an ignition source will cause an explosion.

气体的LEL是指用火源使空气中的该气体爆炸的最低气体浓度。

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It takes a certain minimum level of helium concentration to make it economically viable to separate out the helium from the natural gas.

CNN: U.S. needs a strategy on helium