Method for measuring surface oil of natural protein fibers

[0014] Example 1: Detection of the oil content of white duck down: first establish a calibration equation between the NMR signal value and the oil content, and then use the calibration equation to test the oil content of the fiber sample. First use the traditional extraction method to measure the surface oil content of 4 standard samples of white duck down as a reference, and at the same time obtain a blank sample of white duck down with zero oil content. Keep the temperature at ℃ for 30 minutes, then use the MQA 7020 miniature nuclear magnetic resonance instrument to measure their nuclear magnetic resonance signals successively, calculate the difference between the fiber standard sample and the blank sample nuclear magnetic resonance signal, and then calculate the 5 nuclear magnetic resonance values ​​(including these 4 difference values and 1 zero value) and its corresponding oil content to establish a calibration equation; during the mensuration of the white duck down sample su

[0015] Example 2: Detection of the oil content of gray goose down: first establish a calibration equation between the NMR signal value and the oil content, and then use this calibration equation to test the oil content of the fiber sample. First use the traditional extraction method to measure the surface oil content of 4 standard samples of gray goose down as a reference, and at the same time obtain a blank sample of gray goose down with zero oil content. Keep the temperature at ℃ for 30 minutes, then use the MQA 7020 miniature nuclear magnetic resonance instrument to measure their nuclear magnetic resonance signals successively, calculate the difference between the fiber standard sample and the blank sample nuclear magnetic resonance signal, and then calculate the 5 nuclear magnetic resonance values ​​(including these 4 difference values and 1 zero value) and its corresponding oil content to establish a calibration equation; during the determination of the gray goose down sample

[0016] Example 3: Detection of oil content of sheep wool: first establish a calibration equation between the NMR signal value and the oil content, and then use the calibration equation to test the oil content of the fiber sample. First use the traditional extraction method to measure the surface oil content of 4 standard samples of sheep wool as a reference, and at the same time obtain a blank sample of sheep wool with zero oil content. Keep the temperature at ℃ for 30 minutes, then use the MQA 7020 miniature nuclear magnetic resonance instrument to measure their nuclear magnetic resonance signals successively, calculate the difference between the fiber standard sample and the blank sample nuclear magnetic resonance signal, and then calculate the 5 nuclear magnetic resonance values ​​(including these 4 difference values and 1 zero value) and its corresponding oil content to establish a check equation; when the oil content of the sheep wool sample surface is measured, the sheep woo