Method for detecting calcium and iron in health food

Abstract

The invention discloses a method for detecting calcium and iron in health food. The method comprises the following steps: preparing an extracting solution; adding the extracting solution into a detection substance, carrying out ultrasonic treatment, centrifuging, taking supernate, and fixing the volume; and an inductively coupled plasma emission spectrometer is adopted for detection. The method has the advantages that 1, the cost of experimental consumables is saved, wherein the lowest cost of one microwave digestion tube is about 3000 yuan, so that when a sample is weighed according to an existing method, due to the fact that the length of the microwave digestion tube is long and the viscosity of the sample is large, the sample is prone to being hung on the wall during weighing, and after the sample is hung on the wall, the microwave digestion tube is extremely prone to being damaged in the microwave digestion process of the sample; instead, common centrifugal tube is adopted, so that the experiment cost is saved. 2, the inspection time is saved, wherein according to an existing national standard method, the shortest overall inspection time is about 3 hours, the longest overall inspection time exceeds 1 day, and instead, the inspection time is shortened to about 1-2 hours through the method.

Description

technical field [0001] The invention belongs to the technical field of food detection, in particular to a method for detecting calcium and iron in health food. Background technique [0002] At present, the detection of calcium and iron in soft capsule dosage health food adopts the national standard GB5009.92-2016 Determination of calcium in food (including four test methods) and GB5009.90-2016 Determination of iron in food (including three test methods) method). Among them, the second method of determination of calcium in GB5009.92-2016, EDTA titration, is a physical and chemical detection method, with complicated operation and long inspection cycle. GB5009.92-2016 the first method flame atomic absorption method, the third method inductively coupled plasma emission spectrometry, the fourth method inductively coupled plasma mass spectrometry, GB5009.90-2016 the first method flame atomic absorption method, the second method The pretreatment of inductively coupled plasma emis...

AI Technical Summary

Problems solved by technology

The second method of determination of calcium in GB5009.92-2016 EDTA titration method is a physical and chemical detection method, the operation is complicated, and the inspection cycle is long

GB5009.92-2016 the first method flame atomic absorption method, the third method inductively coupled plasma emission spectrometry, the fourth method inductively coupled plasma mass spectrometry, GB5009.90-2016 the first method flame atomic absorption method, the second method The pretreatment of inductively coupled plasma emission spectrometry and the third method of inductively coupled plasma mass spectrometry includes wet digestion, microwave digestion, pressure tank digestion, and dry digestion. about 3 hours

Wet digestion has the disadvantage that the pretreatment is not easy to control. The pretreatment time of pressure tank digestion and dry digestion exceeds 4 hours, and the overall inspection time is 1-2 days.

Images