Determination method of N-ethylaniline content in rubber and rubber product
A technology for ethylaniline and rubber products is applied in the field of analysis and detection to achieve the effects of accurate and reliable detection methods, simple and fast methods, and few steps.
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Embodiment 1
[0039] Embodiment one: sample to be tested - negative rubber sample (negative sample)
[0040] Select a representative sample, make granules within 5mm×3mm×3mm, mix well; accurately weigh two parts of 2.0g sample, put them into two different conical flasks with stoppers; Add 10mL of methanol, extract in an ultrasonic cleaner at 50°C for 60min, and collect the extract Ⅰ; then add 10mL of methanol separately, extract in an ultrasonic cleaner at 50°C for 60min, and collect the extract II; Ⅲ; then wash the samples with 5mL of methanol respectively, collect the washing solution, combine with the extract solution Ⅲ and set the volume to 25mL respectively; finally, each is filtered through the organic phase membrane to obtain two parts of the solution to be tested;
[0041] The obtained test liquid is analyzed and detected by gas chromatography-mass spectrometry technology, specifically, the test liquid is analyzed on the machine to obtain the response signal of the analyte N-ethylan...
Embodiment 2
[0068] Embodiment two: test sample---positive rubber sample (positive sample)
[0069] 1. Extraction preparation:
[0070] Select a representative sample, make particles within 5mm × 3mm × 3mm, and mix them for testing. Accurately weigh six portions of 2.0 g (accurate to 1 mg) of the sample in a stoppered Erlenmeyer flask; the rest of the steps are similar to Example 1.
[0071] 2. Analysis and detection:
[0072] The extract prepared in the above-mentioned 1 is processed with reference to the steps of Example 1, and the actual measured values calculated at last are listed in Table 1, and the average value and RSD (relative standard deviation) of the calculated actual measured values are shown in Table 1 As shown, the average value is the background value.
[0073] Table 2 Measurement results of actual samples (n=6)
[0074]
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