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How to write the original record of xylene gas chromatography analysis
General test records are divided into the following parts. I don't know the specific test situation. I will write it down for your reference.

Objective: To determine the content of xylene by gas chromatography.

Experimental instruments: XXX gas chromatograph, XXX balance.

Experimental reagents and samples: record the batch numbers of samples and other standards. Also, the reagents used in the experiment should be recorded, such as dimethyl sulfoxide (DMSO), which is chromatographically pure with a purity of 99.5% and made by the manufacturer ..., so it is much easier to repeat the experiment.

Experimental conditions: this is more complicated.

Chromatographic column: SE-54, DB- 1 and other fillers, and then 30m×0.32mm×0.25μm m and other specifications. ..

Carrier gas: nitrogen or something.

Flow rate or pre-column pressure

split ratio

inlet temperature

Chromatographic column temperature

Detector temperature

Sample volume: If it is headspace, write down the conditions of headspace, such as preheating time and temperature.

Detector, is it FID or something

Experimental operation: this is mainly sample preparation.

Preparation of reference substance

sample preparation

For example, accurately weigh xylene 1.0023g, put it in a 50ml volumetric flask, and add DMSO to dissolve it to the scale. Take a proper amount of dimethyl sample, inject it into the gas chromatograph and record the chromatogram. It is mainly the process of weighing samples or removing and diluting them.

Test result: This is a calculation. Peak area, concentration and then sample content.

Conclusion: The content of dimethyl sample is ..., which meets the requirements.

computing formula