Detection of genetically modified ingredients in other products

2 Normative References: The clauses in the following documents are incorporated into the provisions of this standard through reference to the wooden standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard, however; Encourage all parties who have reached agreements based on this standard to study whether the latest versions of these documents can be used. For undated reference documents, their latest versions are applicable to this standard. GB/T 602 Preparation of Standard Solutions for Impurity Determination in Chemical Reagents GB/T14263 Sampling of Bulk Flotation Copper Concentrates - Method 3 Summary: After microwave digestion of the test sample, the content of each element is determined using an inductively coupled plasma atomic emission spectrophotometer

Unless otherwise specified, reagents confirmed as analytically pure and hot distilled water or water of corresponding purity shall be used for analysis. 4.1 Nitric acid (p1.42 g/mL). 4.2 Hydrochloric acid (p1.19 g/mL). 4.3 Mixed acid (hydrochloric acid - nitric acid -3 r 2). 4.4 Mixed acid (1+9): prepared by diluting mixed acid (4.3). 4,5 Single element standard solutions: Standard solutions for various elements such as lead, zinc, cobalt, nickel, magnesium, cadmium, arsenic, antimony, manganese, mercury, etc. are prepared according to the GB/T 602 method, or standard substances are directly used, with a mass concentration of 10 mg/mL. 4.6 Mixed standard solution: Transfer several standard stock solutions (4.5) of lead, zinc, diamond, nickel, magnesium, cadmium, arsenic, antimony, keng, and mercury into a 100 mnl volumetric flask, dilute with mixed acid (4.4) and bring to volume to the mark v, and mix well

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