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Determination of lead, cadmium, arsenic, mercury and copper residues in traditional Chinese medicine (2)
Time of Update: 2022-07-01
2. Atomic Absorption Spectrophotometry(1) Basic conceptsAtomic absorption spectrophotometry is also known as atomic absorption spectroscopy. Its measurement objects are metal elements and some non-m
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Determination of lead, cadmium, arsenic, mercury and copper residues in traditional Chinese medicine (3)
Time of Update: 2022-07-01
If you use M6 atomic absorption spectrophotometer, when adding matrix modifier, you can refer to the following measurement conditions: use pyrolytic coated graphite tube, Zeeman method background correction, hollow cathode lamp working current 4mA, slit 0.
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Determination of lead, cadmium, arsenic, mercury and copper residues in traditional Chinese medicine (5)
Time of Update: 2022-07-01
Preparation of reference solution(1) Reference substance stock solution: accurately measure appropriate amounts of lead, cadmium, arsenic, mercury, and copper single element standard solutions, and dilute with 10% nitric acid solution to make each 1ml containing 1ug, 1ug, 0.
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Determination of lead, cadmium, arsenic, mercury and copper residues in traditional Chinese medicine (4)
Time of Update: 2022-07-01
2. Determination of Arsenic Accurately measure 2ml of the test solution after microwave digestion, add 1ml of 10% ascorbic acid solution (prepared just before use), shake well, add 1ml sulfuric acid solution (20→100), add water to 10ml, shake well Put it in a water bath at 80℃ and heat it for 3 minutes (or place it for 1 hour), take it out, let it cool, and get it .
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Determination of lead, cadmium, arsenic, mercury and copper residues in traditional Chinese medicine (1)
Time of Update: 2022-07-01
When using the instrument method to analyze the trace harmful elements in the traditional Chinese medicine, it is generally necessary to digest and destroy the organic matter in the sample, and completely dissolve in water or dilute acid.
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Inspection method for arsenic in traditional Chinese medicine
Time of Update: 2022-06-30
(2) Ancient Chua's MethodThe principle of the ancient Chua’s method: the use of metal zinc and acid to generate new ecological hydrogen reacts with trace arsenite in medicines to generate volatile arsine hydrogen, and mercury bromide test paper produces yellow to brown arsenic spots, and Compare the arsenic spots produced by the quantitative standard arsenic solution under the same conditions to determine the limit of arsenic salt .
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New breakthrough in traditional Chinese medicine: ferritin "wrapped" arsenic targeted treatment of leukemia
Time of Update: 2021-11-13
A new research result participated by the Department of Hematology, Zhujiang Hospital of Southern Medical University, puts forward the latest treatment strategy for targeted "bionic delivery" of arsenic agents, which is expected to enter the clinic in the future, improve the curative effect and scope of application of leukemia, and reduce its toxic side effects .
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The standard for determination of mercury and arsenic element forms and valence states of Chinese
Time of Update: 2019-12-19
On December 18, 2019, centering closely on the overall goal of the 13th five year plan for national drug safety, taking the establishment of "the most rigorous standard" as the criterion and benchmark
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The standard for determination of mercury and arsenic element forms and valence states of Chinese
Time of Update: 2019-12-19
Wen Di Di Si Nan On December 18, 2019, centering closely on the overall goal of the 13th five year plan for national drug safety, taking the establishment of "the most rigorous standard" as the criter
