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Water sample trace lead fast test kit

A technology of detection kits and detection reagents is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by causing chemical reactions of materials, which can solve the problems of high detection technology requirements, expensive instruments and equipment, and long detection time. and other problems, to achieve the effect of shortening the detection time, avoiding the waste of manpower and material resources, and being convenient to carry.

Inactive Publication Date: 2017-03-29
BEIJING AFD PHARMA TECH DEVCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although these methods are sensitive and accurate, they generally have problems such as cumbersome pretreatment, expensive equipment, long detection time, and high detection technology requirements. It is difficult to apply them to food, water samples, urine and other environments and biological samples. On-site rapid detection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] Preparation method of sulfhydryl filter paper:

[0055] Dry the quantitative analysis filter paper, and immerse each 30g of quantitative analysis filter paper in a volume of 80ml (can be appropriately increased to 120ml) thioglycolic acid, 60ml (can be appropriately increased to 80ml) glycolic anhydride, and 30ml (can be appropriately increased to 34ml) with a volume concentration of 36 % acetic acid, 0.2ml (can be appropriately increased to 0.4ml) concentrated sulfuric acid and 8ml (can be appropriately increased to 12ml) deionized water solution, placed in a 30 ℃ electric heating constant temperature airtight drying box for 72h, taken out and washed with deionized water To neutral, finally squeeze out the water and dry in a 30 ℃ electric heating constant temperature drying oven.

[0056] 4. Detection principle

[0057] The lead ions in the water sample are adsorbed and concentrated by the sulfhydryl adsorption filter paper. After being eluted by a small amount of hyd...

Embodiment 1

[0059] Example 1: Detection of lead content in contaminated water samples

[0060] Take 20ml of the contaminated water sample and filter and adsorb it with thiol filter paper. The thiol filter paper is placed in the adsorption funnel, the adsorption funnel is placed on the support, and a waste liquid cup is placed under the support.

[0061] After the filtration is completed, remove the waste liquid cup, fully elute the sulfhydryl filter paper with 2 ml of hydrochloric acid eluent A, and collect all the eluents in a reaction tube.

[0062] Add 0.5 ml of sodium hydroxide neutralization solution B to the reaction tube with the collected eluent, and after thorough mixing, add 1 ml of dithizone chloroform solution C and 0.5 ml of ammoniacal hydroxylamine hydrochloride and ammonium citrate D, shake and let stand Set it for 10min, observe the color reaction of the liquid in the reaction tube, and compare it with the trace lead standard color chart.

[0063] In this example, the con...

Embodiment 2

[0066] Example 2: Detection of lead content in the urine samples of occupational workers

[0067] Taking 20ml of deionized water as a blank control, take 20ml of urine from four subjects, and use sulfhydryl filter paper for filtration and adsorption after labeling. Among them, the sulfhydryl filter paper is placed in the adsorption funnel, the adsorption funnel is placed on the bracket, and the bracket is placed under the bracket. There is a waste cup.

[0068] After the filtration was completed, the waste liquid cup was removed, and 2 ml of hydrochloric acid eluent A was used to fully elute the sulfhydryl filter paper, and all the eluents were collected in a reaction tube.

[0069] Add 0.5ml of sodium hydroxide neutralization solution B to the reaction tube, and after thorough mixing, add 1ml of dithizone chloroform solution C and 0.5ml of ammoniated hydroxylamine hydrochloride and ammonium citrate mixed solution D, shake and let stand for 10min, Observe the color reaction o...

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Abstract

The invention discloses a water sample trace lead fast test kit. The test kit comprises a trace lead test reagent, trace lead standard color cards and several consumables. All the components are individually packed, and placed together in an outer box. The trace lead test reagent comprises a hydrochloric acid eluent A, a sodium hydrate neutralization solution B, a dithizone chloroform solution C and a mixture D of hydroxylamine hydrochloride and ammonium citrate. The consumables comprise water samplers, pippet tips, reaction tubes, sulfhydryl filter paper, adsorption funnel, a rack and waste liquid cups. The water sample trace lead fast test kit has the advantages of (1) being capable of being used for screening samples at site under a non-laboratory condition, (2) having no need of the coordination of expensive equipment and high-tech personnel, (3) being capable of completing a test in 2 hours to achieve the fast test of the trace lead, (4) having a test sensitivity, stability and reliability satisfying the requirement of hygiene assessment standard, and (5) having the individually packed test paper, consumables and reagent. The water sample trace lead fast test kit is convenient to carry.

Description

technical field [0001] The invention relates to a detection kit, in particular to a water sample trace lead rapid detection kit, which belongs to the technical field of chemical component detection. Background technique [0002] Due to the extensive use of lead mining, smelting and lead-containing products, such as paint, coating, printing, electronic products, hardware processing and battery manufacturing, the discharge of three wastes from factories and the discharge of automobile exhaust has caused a large amount of lead dust. And lead-containing compounds into the atmosphere, water and soil, can easily cause pollution of the living environment. [0003] Lead is a heavy metal element and cannot be biodegraded. The accumulation of lead dust or lead-containing compounds in the local environment can easily be absorbed by humans and directly cause lead poisoning. Lead dust or lead-containing compounds accumulate in the local environment for a long time, and are indirectly ea...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 刘记瑛傅松涛
Owner BEIJING AFD PHARMA TECH DEVCO
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