A method for detecting residual melamine and cyanuric acid in melamine cyanurate
A technology of melamine cyanurate and melamine, which is applied in the field of detection of melamine and cyanuric acid residues in melamine cyanurate, can solve the problems of unsuitable detection, low detection limit, unsuitable detection of melamine, etc., and achieve detection The effect of reducing the limit, avoiding the influence of impurities, and shortening the detection time
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Embodiment 1
[0075] Get melamine cyanurate sample 2.0189g, detect melamine and cyanuric acid residual amount under the above-mentioned requirement conditions, the results are shown in Table 3, image 3 ,Table 4, Figure 6 .
[0076] Melamine residue test results in table 3 melamine cyanurate
[0077] Test serial number retention time (min) result(%) 1 8.68 0.0012 2 8.57 0.0012
[0078] Cyanuric acid residue test result in table 4 melamine cyanurate
[0079] Test serial number retention time (min) result(%) 1 4.18 0.2401 2 4.21 0.2393
Embodiment 2
[0081] Take 2.0156 g of melamine cyanurate sample, add melamine and 5.0 μg / mL cyanuric acid in a proportion of 5.0 μg / mL, and detect the residual amount of melamine and cyanuric acid under the above-mentioned requirements. The test results are shown in Table 5 and Table 6.
[0082] Melamine residue test results in table 5 melamine cyanurate
[0083] retention time (min) Scale amount (μg / mL) Result (μg / mL) Recovery rate(%) 8.50 5.0 4.9869 99.74
[0084] Table 6 melamine cyanuric acid residual test results in melamine cyanurate
[0085] retention time (min) Scale amount (μg / mL) result(%) Recovery rate(%) 4.25 5.0 4.9689 99.38
Embodiment 3
[0087] Take 2.0000 g of melamine cyanurate sample, add melamine and 5.0 μg / mL cyanuric acid in a proportion of 5.0 μg / mL, repeat the preparation of 3 copies, and detect the residual amount of melamine and cyanuric acid under the above-mentioned requirements. The test results are shown in Table 7 and Table 8.
[0088] Melamine residue test results in table 7 melamine cyanurate
[0089] Test serial number retention time (min) Result (μg / mL) Standard recovery (%) 1 8.59 4.9869 99.74 2 8.62 4.9568 99.14 3 8.60 4.9298 98.60
[0090] Cyanuric acid residue test result in table 8 melamine cyanurate
[0091] Test serial number retention time (min) Result (μg / mL) Standard recovery (%) 1 4.25 4.9568 99.14 2 4.21 4.9859 99.72 3 4.23 4.9758 99.52
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