Diluted solution for measuring lead in whole blood by graphite furnace atomic absorption spectrometry

A technology of graphite furnace atom and diluent, which is applied in the field of diluent, can solve the problems of cumbersome operation, excessive blood, and increase the difficulty of clinical examination, etc., and achieve the effect of accurate and reliable measurement method, satisfactory measurement precision and accuracy

Inactive Publication Date: 2013-06-19
SHANGHAI HUAZHI SPECTRUM INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of diluent that is used for graphite furnace atomic absorption method to measure lead in whole blood, to solve the prior art when using graphite furnace atomic absorption method to measure lead content in blood, need to spend more Blood, and the operation is cumbersome, which increases the difficulty of clinical examination

Method used

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  • Diluted solution for measuring lead in whole blood by graphite furnace atomic absorption spectrometry

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Embodiment 1

[0022] The present invention provides a kind of dilution solution that is used for measuring lead in whole blood by graphite furnace atomic absorption method, and the dilution solution comprises 0.5% HNO3, 0.3% Triton-100, 1.2% NH by volume percentage 4 h 2 PO 4 , and the remainder of the secondary deionized water. The diluent can be obtained by purification or other means to meet higher purity.

[0023] When measuring lead in whole blood, acidify with nitric acid, dilute blood sample with Triton-100 solution as diluent, NH 4 h 2 PO 4 As a matrix modifier, it was determined by graphite furnace atomic absorption spectrophotometry. NH 4 h 2 PO 4 The role of: by optimizing the matrix modifier NH 4 h 2 PO 4 (0.2% ~ 2%), the ashing temperature of lead can be increased to 800 ℃ without loss of lead, which effectively eliminates the background interference in the atomization stage caused by the incomplete ashing of organic matter in the blood sample, reduces the background...

Embodiment 2

[0030] Present embodiment only will illustrate with the different part in embodiment 1, and described diluent comprises HNO3, 0.2% Triton-100, 1.6%NH by volume percentage 4 h 2 PO 4 , and the remainder of the secondary deionized water. Using this diluent to absorb the whole blood sample to test the lead content, the determination error is within 5.5%.

Embodiment 3

[0032] Present embodiment only will illustrate with the different part in embodiment 1, and described diluent comprises HNO3, 0.5% Triton-100, 0.8%NH by volume percentage 4 h 2 PO 4 , and the remainder of the secondary deionized water. Using this diluent to absorb the whole blood sample to test the lead content, the determination error is within 5.5%.

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Abstract

The invention discloses a diluted solution for measuring lead in whole blood by graphite furnace atomic absorption spectrometry. The diluted solution comprises 0.1-1% of HNO3, 0.05%-1% of Triton-100, 0.2%-2% ofNH4H2PO4, and the balance being a base diluted solution, in terms of volume percentage. Compared with a conventional diluted solution, the diluted solution for measuring the lead in the whole blood by the graphite furnace atomic absorption spectrometry has the following obvious advantages that a. a standard solution used for measurement needs not match with the whole blood; b. measurement precision and measurement accuracy can meet measurement requirements by optimizing experimental conditions and eliminating interference on the measurement; c. the measurement method is accurate and reliable, can meet analysis and measurement of the content of the lead in the whole blood; and d. a measurement error of the content of the lead in a whole blood sample measured by the method is within 5.5%.

Description

technical field [0001] The invention relates to a diluent used for determining lead in whole blood by graphite furnace atomic absorption method. Background technique [0002] Trace element test in blood is one of the routine test items in clinical medical test. Among them, lead is an unnecessary trace element for the human body. Lead poisoning in children will have adverse effects on children's intellectual development, physical growth, learning and memory ability, and sensory function. Since lead poisoning is a slow development process, the symptoms of poisoning are not particularly obvious. Long-term lead exposure will cause irreversible damage to children's brain function. [0003] In recent years, with the development of science and technology and industrial modernization, the application range of lead has become more and more extensive. The total output of lead in the world has reached more than 300 million tons, and 50% of lead has been released into our living enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/38G01N21/31
Inventor 赵永强陈建钢刘志高
Owner SHANGHAI HUAZHI SPECTRUM INSTR
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