Seeking help to understand why there is a large difference between chromatographic analysis results and those obtained using detection tubes
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I used chromatography to detect trace amounts of benzene in the product
Is the range of the test tube too large? Testing should be carried out in multiples of ten; dividing the results by ten may yield more reliable outcomes
The range of the detection tubes is not large; it’s all at the ppb level
Is the detection accuracy different?
Since there is a standard gas, why not use it to verify both the chromatograph and the gas detector at the same time?
Since there is a standard gas, why not use it to verify both the chromatograph and the gas detector at the same time? Will the result be in ppb? It’s not ppm or volume fraction.