Method for determining dicyandiamide residual quantity in dairy product

[0092] Example 1:

[0093] In the present embodiment, the sample employed is a brand of milk powder. The measurement method of the dicyandide residual amount in the dairy product of the present invention mainly includes the steps of:

[0094] S1: Configure different concentrations of dicyandide standard working fluid;

[0095] S2: Dilutinium (in this example refers to a brand of milk powder) ultrasonic extraction with acetonitrile and water mixed solution, matrix dispersion solid phase extraction, and prepares liquid;

[0096] S3: The standard working fluid prepared in step S1 is mass spectrometer using a liquid chromatographic tandem spectrometer, and a standard curve is drawn;

[0097] S4: The liquid chromatographic solution is measured to be mass spectrometry in step S2, and the content of dichalamine in the dairy product is obtained by the standard curve of step S3.

[0098] In the present embodiment, the method of determining the dicyanlamine residual amount in the dairy product

[0148] Example 2:

[0149] In the present embodiment, the sample type employed is a degreasing powder of a brand.

[0150] Potonder specifications and number: 018583 g (1 mL) / R29762F (100 μL).

[0151] The name of the instrument: Thermo Liquid chromatography system spectrometry.

[0152] The measurement method of the dicyandide residual amount in the dairy product of the present invention mainly includes the steps of:

[0153] S1: Configure different concentrations of dicyandide standard working fluid;

[0154] S2: Dikanide residue in the dairy product (in this example refers to the degreasing powder of a brand) ultrasound with acetonitrile and water mixed solution, the matrix dispersion solid phase extraction is purified, and prepared a liquid;

[0155] S3: The standard working fluid prepared in step S1 is mass spectrometer using a liquid chromatographic tandem spectrometer, and a standard curve is drawn;

[0156] S4: The liquid chromatographic solution is measured to be mass sp