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Edible oil , containing a variety of micro and macro metal elements , these elements close relationship with the body's health , growth and development , and disease prevention and control , this article by the HNO 3 < / sub > H 2 < / sub> O 2 mixed digestion method of edible oil sample pre-treatment , flame and graphite furnace atomic absorption spectrometry determination of edible oil in the Fe , Cu , Zn , Ca , Mg , K , Na content elements proportional relationship preliminary study , and compared with the corresponding element of the human body , and to explore the use value of the metal elements in the edible oil , at the same time the accuracy and precision of the determination of the different elements of the optimum working conditions and measurement method . The paper is divided into five chapters . Chapter 1 : Summary of the detection of metal elements in the edible oil . Chapter II : graphite furnace atomic absorption spectrometry determination of edible oil in the trace metals copper and manganese , due to the low levels of copper and manganese , were measured by graphite furnace atomic absorption spectrometry , copper and manganese detection limit for 0.00255,0.00233 mg / L , respectively , The relative standard deviation : 4.31% , 1.99% . Chapter : Flame atomic absorption method for the determination of metal elements , Fe and Zn in the edible oil detection limits were 0.042,0.013 mg / L, the relative standard deviation : 3.82% , 1.22% . Chapter : graphite furnace atomic absorption method for the determination of metal elements such as lead in the edible oil , containing both human non-essential harmful metal elements such as lead , in the edible oils and fats , in addition to containing essential trace metals detection limit of 0.00042 mg / L relative standard deviation : 3.21% . Chapter 5 : microinjection injection determination of soybean oil in eight metallic elements , trace elements content in the oil is low, the samples need large conventional flame atomic absorption spectrometry detection . This gives sample digestion caused certain difficulties , this chapter will change the conventional flame atomic absorption injector microinjection injection , each measured simply injection dozens microliters sample of the Act need less digestible . Proportional relationship between the multiple elements and of each element can be simultaneously detected , and compared with the corresponding element of the human body , and to explore the use value of the soybean oil in a metal element .
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