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Reagent for measuring cadmium and preparing method thereof

The technology of a reagent and a masking agent is applied in the field of determination of heavy metal cadmium, which can solve the problems of high price, high detection cost, untimely supply and the like, and achieves the effects of good stability, simple preparation and reduction of human error.

Active Publication Date: 2010-04-14
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These special reagents are expensive, and the supply is not timely. If you rely on imports for a long time, the detection cost is high. A time-saving, labor-saving, and cost-saving method that can quickly detect heavy metal cadmium on site is needed to meet the actual environmental monitoring requirements of our country. need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The reagent for measuring cadmium is made up of reagent A and reagent B, wherein by weight, reagent A is made up of 100 parts of chromogenic agent, 100 parts of acidity regulator and 300 parts of sensitizer; Reagent B is made up of 40 parts of buffering agent, Composed of 30 parts masking agent 1 and 50 parts masking agent 2.

[0019] Wherein, the color developer is p-nitrophenyldiazoaminoazobenzene, the acidity regulator is potassium hydroxide, and the sensitizer is Triton X-100 (commercially available); the buffering agent is borax-sodium hydroxide, and the masking agent 1 is sodium chloride and masking agent 2 is sodium thiosulfate.

[0020] Preparation:

[0021] Preparation of reagent A: Weigh 100 parts of color developer, 100 parts of acidity regulator and 300 parts of sensitizer into a 100mL brown volumetric flask, dissolve with alcohol, dilute to volume and shake well, set aside.

[0022] Preparation of Reagent B: Weigh 40 parts of buffering agent, 30 parts of ...

Embodiment 2

[0024] The difference from Example 1 is:

[0025] The reagent for measuring cadmium is made up of reagent A and reagent B, wherein by weight parts, reagent A is made up of 50 parts of chromogen, 1200 parts of acidity regulator and 100 parts of sensitizer; Reagent B is made up of 20 parts of buffering agent, 80 parts Consists of 1 part masking agent 1 and 30 parts masking agent 2.

[0026] Chromogen: o-carboxyphenyldiazoaminoazobenzene; acidity regulator: sodium hydroxide; sensitizer: Span 20 (commercially available); buffer: sodium carbonate-sodium bicarbonate; masking agent 1 is: potassium chloride; masking agent 2 is: sodium fluoride.

[0027] Preparation:

[0028] Preparation of Reagent A: Weigh 50 parts of chromogen, 1200 parts of acidity regulator and 100 parts of sensitizer into a 100 mL volumetric flask, dissolve in alcohol and divide into ampoules by 0.1-0.5 mL each, seal and store for later use.

[0029] Preparation of Reagent B: Weigh 20 parts of buffering agent, ...

Embodiment 3

[0031] The reagent of measuring cadmium is made up of reagent A and reagent B, wherein by weight parts, reagent A is made up of 200 parts of chromogen, 300 parts of acidity regulator and 800 parts of sensitizer; Reagent B is made up of 150 parts of buffering agent, 10 parts Consists of 1 part Masking Agent 1 and 100 parts Masking Agent 2.

[0032] The developer is: phenyldiazoaminoazobenzene; the acidity regulator is: ammonia; the sensitizer is: Tween 80 (commercially available); the buffer is: sodium carbonate-sodium bicarbonate, and the masking agent 1 is : sodium citrate; masking agent 2: potassium sodium tartrate.

[0033] Then operate by the preparation method of embodiment 1 or 2.

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PUM

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Abstract

The invention relates to a detecting technique of heavy metal cadmium, in particular to a reagent for rapidly detecting the cadmium and a preparation method thereof. The reagent consists of a reagentAand a reagent B, wherein, by weight proportion, the reagent A consists of 50-200 parts of visualization reagent, 100-1200 parts of acidity regulating reagent and 100-800 parts of sensitizing reagent; and the reagent B consists of 20-150 parts of buffering agent, 10-80 parts of masking reagent 1 and 30-100 parts of masking reagent 2. By adopting the invention, the analysis procedures can be simpli fied, such as operations of weighting, solution allocation, and the like, can be omitted, the advantages of convenience and the rapidness can be brought, the personal errors can be reduced, and the accurate result can be obtained by the operation by persons who are not analyst. The validity period of the reagent A is more than six mouths after being tightly stored at normal temperature; and the reagent B belongs to solid powder capsules, which avoids the instability, and the like, of the liquid reagent, thereby the validity period is more than eight mouths after being tightly stored at the normal temperature.

Description

technical field [0001] The invention relates to a detection technology for heavy metal cadmium, in particular to a reagent for rapid detection of cadmium and a preparation method thereof. Background technique [0002] Since the discovery of cadmium in the early 20th century, the output of cadmium has increased year by year. A considerable amount of cadmium is discharged into the environment through waste gas, waste water, and waste residue, causing pollution. After the environment is polluted by cadmium, cadmium can be enriched in organisms and enter the human body through the food chain, causing chronic poisoning. Cadmium poisoning mainly manifests as osteoporosis, decalcification, and osteomalacia. Chronic cadmium poisoning can cause mild hypochromic anemia; acute cadmium poisoning can cause pulmonary edema and emphysema. Cadmium is a highly suspected carcinogen that may cause prostate and bronchial cancer. [0003] At present, the inspection and detection of cadmium i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/25
Inventor 王颜红林桂凤王世成张红王姗姗
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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