Analysis method for amide compounds
A technology for amide compounds and analytical methods, applied in analytical materials, material separation, measurement devices, etc., can solve the problems of difficulty in achieving separation effects and lack of uniform standards, and achieve simple and fast analytical methods, good linearity, and good separation. effect of effect
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Embodiment 1
[0029] A method utilizing gas chromatography-mass spectrometry to measure amides, comprising the following steps:
[0030] A. Preparation of standard solution
[0031] Weigh a certain quality of standard solution, prepare a single standard solution of 1000mg / L, and then dilute it step by step to 0.01mg / L, 0.1mg / L, 0.5mg / L, 1mg / L, 2mg / L, 5mg / L, 10mg / L mixed standard solution.
[0032] B. Pretreatment of samples
[0033] Take the sample from the clean part of the sample, cut it into pieces below 3mm×3mm, weigh 1g±0.1g (accurate to 0.1mg) of the sample into a 60ml glass reaction bottle, add 10ml methanol, extract for 1h±5min, repeat the above operation once, and combine The two extracts were mixed evenly, concentrated with a rotary evaporator, and finally the volume was adjusted to 1ml with methanol, and the sample was filtered through a 0.45um microporous membrane to obtain the sample to be tested.
[0034] C. Selection of Gas Chromatography-Mass Spectrometry Conditions
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Embodiment 2 Embodiment 1
[0052] The peak situation and qualitative and quantitative ion selection of five kinds of amide compounds in embodiment 1
[0053] Table 2 The peak time and qualitative and quantitative ions of five kinds of amide compounds
[0054]
[0055]
[0056] Through Table 2 and figure 1 It can be seen that under the analysis conditions of Example 1, the five amide compounds can be well separated.
Embodiment 3
[0057] Embodiment 3 standard working curve
[0058] Table 3 Linear equations and correlation coefficients of five kinds of amide compounds
[0059]
[0060] from Table 3 and figure 2 It can be seen that within the linear range of 0.01mg / L-10mg / L, the linear correlation coefficients of the five amides are all above 0.9995.
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