High performance liquid chromatography-atomic fluorescence combined system
Atomic Fluorescence Spectroscopy (AFS) is a spectroscopy technology developed in the 1970s. It uses hydride generation technology to eliminate sample matrix interference and simplify the interface technology between liquid chromatograph and AFS. The price is also higher than ICP- MS is much cheaper, and the combined technology enables morphological analysis of elements rather than aggregate analysis. The combination of high performance liquid chromatography and atomic fluorescence spectroscopy can solve various problems mentioned above. It can provide convenient and reliable methods for the determination of mercury compounds and arsenic compounds in environmental samples and biological samples, and can also be domestic atomic fluorescence. The promotion of the provision of significant social and economic benefits. Studies have shown that the interface technology combined with atomic fluorescence spectroscopy is a key problem to be solved on the basis of high performance liquid chromatography for the separation of various mercury compounds and arsenic compounds. High performance liquid chromatography and atomic fluorescence spectrometry are connected by a Teflon tube, and connected to a microwave digestion device (or UV lamp) in the middle, which can greatly improve the conversion of organic mercury and arsenic compounds to inorganic mercury and arsenic compounds, and improve their sensitivity. . Optimizing the inner diameter and length of the Teflon tube allows for good separation. As research and environmental protection departments are increasingly demanding the determination of metal forms, this combination will expand to more elemental forms of analysis with high morphological separation capabilities, high measurement sensitivity and cost performance. Get promoted for use.
Vitamins:
Vitamin A:
Retinol. Carotene compounds responsible for transmitting light sensation in the
retina of the eye. Deficiency leads to night blindness.
Beta carotene: An
antioxidant which protects cells against oxidation damage that can lead to cancer.
Beta carotene is converted, as needed, to vitamin A. Food sources of beta
carotene include vegetables such as carrots, sweet potatoes, spinach and other
leafy green vegetables; and fruit such as cantaloupes and apricots. Excessive
carotene in the diet can temporarily yellow the skin, a condition called
carotenemia, commonly seen in infants fed largely mushed carrots.
Vitamin B1:
Thiamin, acts as a coenzyme in body metabolism. Deficiency leads to beriberi, a
disease of the heart and nervous system.
Vitamin B2:
Riboflavin, essential for the reactions of coenzymes. Deficiency causes
inflammation of the lining of the mouth and skin.
Vitamin B3:
Niacin, an essential part of coenzymes of body metabolism. Deficiency causes
inflammation of the skin, vagina, rectum and mouth, as well as mental slowing.
Vitamin B6:
Pyridoxine, a cofactor for enzymes. Deficiency leads to inflammation of the
skin and mouth, nausea, vomiting, dizziness , weakness and anemia.
Folate (folic
acid): Folic acid is an important factor in nucleic acid synthesis (the genetic
material). Folate deficiency leads to megaloblastic anemia.
Vitamin B12: An
essential factor in nucleic acid synthesis (the genetic material of all cells).
Deficiency leads to megaloblastic anemia, as can be seen in pernicious anemia.
Vitamin C:
Ascorbic acid, important in the synthesis of collagen, the framework protein
for tissues of the body. Deficiency leads to scurvy, characterized by fragile
capillaries, poor wound healing, and bone deformity in children.
Vitamin D: A
steroid vitamin which promotes absorption and metabolism of calcium and
phosphorus. Under normal conditions of sunlight exposure, no dietary
supplementation is necessary because sunlight promotes adequate vitamin D
synthesis in the skin. Deficiency can lead to osteomalacia in adults and bone
deformity (rickets) in children.
Vitamin E:
Deficiency can lead to anemia.
Vitamin K: An
essential factor in the formation of blood clotting factors. Deficiency can
lead to abnormal bleeding.
Nutritions:
For the treatment
of nutritional disease, any of the nutrient-related diseases and conditions
that cause illness in humans. They may include deficiencies or excesses in the
diet, obesity and eating disorders, and chronic diseases such as cardiovascular
disease, hypertension, cancer, and diabetes mellitus. Nutritional diseases also
include developmental abnormalities that can be prevented by diet, hereditary
metabolic disorders that respond to dietary treatment, the interaction of foods
and nutrients with drugs, food allergies and intolerances, and potential
hazards in the food supply. All of these categories are described in this
article. For a discussion of essential nutrients, dietary recommendations, and
human nutritional needs and concerns throughout the life cycle, see nutrition,
human.
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