2results about How to "Efficient detection method" patented technology

The application discloses a method for quality prediction of tinplate cans based on iron ion migration amount, which comprises the following steps: sealing and soaking the tinplate cans filled with acetic acid, and performing temperature acceleration test; sampling on the third day of the temperature acceleration test, and detecting the iron ion migration amount; sampling on the tenth day of the temperature acceleration test, and detecting the iron ion migration amount; and predicting the quality of the tinplate cans based on the iron ion migration amounts on the third day and the tenth day. The application takes the migration amount on the third day as a short-term risk indicator, and takes the migration amount on the tenth day as a key quality determination standard of long-term stability indicator. Based on the detection results of the two time points, the iron ion migration trend of the tinplate cans within a six-month shelf period can be reliably predicted, the sensory quality and stability of beer products can be ensured, clear and quantitative delivery access conditions of suppliers can be set according to the detection results, the risk of beer quality deterioration caused by quality problems of packaging materials can be avoided from the source, early prediction and precise control of the quality of packaging materials are realized, and the overall quality management level is improved.

This invention provides a method for detecting the diethyl sulfate content in methyl 4-acetamido-2-ethoxybenzoate. The method involves derivatizing the sample with sodium iodide-ascorbic acid and detecting the sample using a headspace gas chromatograph equipped with an ECD detector. The chromatographic column is an Agilent DB-624 30m × 0.53mm × 3μm column, the injection port temperature is 220℃, the detector temperature is 250℃, and the carrier gas is N2. 2， Flow rate: 1.5 mL / min, temperature programmed: initial column temperature 70℃, increased to 150℃ at a rate of 5℃ / min and held for 0 min; then run at 240℃ and held for 5 min, flow rate 3 mL / min. This invention provides a convenient, efficient, and accurate method for detecting the diethyl sulfate content in methyl 4-acetamido-2-ethoxybenzoate. This method uses gas chromatography to detect the diethyl sulfate content in methyl 4-acetamido-2-ethoxybenzoate, thereby effectively ensuring medication safety.