&Nbsp&Nbsp; Compared with GB/T21911-2008, the main changes in this standard are as follows:&Nbsp; Revise the standard name to "National Food Safety Standard - Determination of Phthalate Esters in Food"&Nbsp&Nbsp; Added two target compounds, diallyl phthalate and diisoonyl phthalate&Nbsp&Nbsp; Added the isotope internal standard method for quantification as the first method&Nbsp&Nbsp&Nbsp&Nbsp; The corresponding standard products of the new national standard are 17 mixed standards+1 DINP single standard form:&Nbsp; ● e.1 Diisononyl phthalate (dinp) standard solution (1.0 μ The total ion flow chromatogram (external standard method) of g/ml is shown in Figure e.1. Figure e.1 Diisononyl phthalate (dinp) standard solution (1.0 μ Total ion flow chromatogram (external standard method) of g/ml&Nbsp&Nbsp; ● e.2 17 standard solutions of phthalates (0.12 μ The total ion flow chromatogram (external standard method) of g/ml is shown in Figure e.2. Figure e.2 17 Standard Solutions of Phthalate Esters (0.12 μ Total ion flow chromatogram (external standard method) of g/ml&Nbsp&Nbsp; Interpretation of DNP and DINP:&Nbsp; CAS 84-76-4 di-nonyl phthalate (dnp singlet)&Nbsp&Nbsp; CAS 28553-12-0 is a mixture of isomers such as diisoonyl phthalate (dinp), which is suitable as a standard substance&Nbsp&Nbsp; CAS 68515-48-0 is a mixture of phthalate esters, containing three isomers: diisooctyl phthalate (diop), diisoononyl phthalate (dinp), and didp, with the main component being dinp&Nbsp
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