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Device for semi-quantitative detection of chromium content in soil with time as coordinate and preparation method thereof

A semi-quantitative detection, chromium content technology, applied in soil material testing, material inspection products, etc., can solve problems such as time-consuming, unsuitable for carrying, complicated operation, etc., to avoid human error and achieve the effect of novel detection methods

Active Publication Date: 2019-09-06
河南省林业科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently established chromium detection methods mainly include graphite furnace atomic absorption spectrometry, flame atomic absorption spectrometry, and atomic fluorescence spectrometry. Relatively long, it is inconvenient to carry out on-site operation in the field, and it is not suitable for the detection of on-site personnel
[0005] Invention patent [CN103412125B] introduces a "gold standard test paper for rapid detection of chromium ions and its preparation method". Animals, to obtain antibodies, the resulting antibodies also need to be labeled with colloidal gold, which requires professionals to operate
[0006] Invention patent [CN102121905A] introduces a "test paper for detecting heavy metal chromium in water quality and its preparation method", the film formation of cetyltrimethylamine bromide, polyvinyl alcohol, citric acid and diphenylcarbazide The reagent is coated on the substrate film carrier sheet, and then assembled on the test strip. During the detection, the photoelectric sensor is used to detect the solubility of chromium ions. This method uses less amount of the analyte, the detection time is 3min, and the detection limit is 1.9 mol / L, but the photoelectric sensors used in this method need to be equipped with chips, displays, diodes, etc., and are not suitable for field workers to carry
[0007] Invention patent [CN104034725B] introduces "a rapid detection test paper for trace chromium and its preparation method". Although this method is suitable for rapid on-site determination and is easy to carry, the color of the standard color card will change over time, and each Differences in individual subjective judgments of color contrast will lead to large errors in the judgment of test results

Method used

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  • Device for semi-quantitative detection of chromium content in soil with time as coordinate and preparation method thereof
  • Device for semi-quantitative detection of chromium content in soil with time as coordinate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]The device for semi-quantitative detection of chromium content in soil with time as coordinates includes an immersion area, a climbing area, a color development area and a holding area, the climbing area is located between the immersion area and the color development area, and the color development area The area is located between the climbing area and the gripping area, the immersion area, the climbing area, the color development area and the gripping area share a detection substrate, the immersion area and the climbing area There are water-absorbing fiber layers on the upper and lower surfaces of the detection substrate. The detection substrate is made of Lishihe, reed, camphor tree bark and walnut shell according to the rapid quantitative filter paper manufacturing process (the rapid quantitative filter paper manufacturing process is the prior art, and will not be repeated here), Lishihe, reed 1. The ratio of camphor bark and walnut shells is as follows: Lishihe is 26...

Embodiment 2

[0036] A method for preparing a device for semi-quantitatively detecting chromium content in soil with time as a coordinate, comprising the following steps:

[0037] (1) Preparation of detection substrate: The raw materials for preparation of detection substrate are composed of Lishihe, reed, camphor tree bark and walnut shell. The ratio of Lishihe, reed, camphor tree bark and walnut shell is as follows: Lishihe Wowei 26 kg, reed 13 kg, camphor tree bark 48 kg and walnut shell 10 kg; made according to the rapid quantitative filter paper preparation process;

[0038] (2) Division of functional areas: Divide an immersion area, a climbing area, a color development area and a grip area on the detection substrate, the climbing area is located between the immersion area and the color development area, the The color developing area is located between the climbing area and the holding area, the immersion area, the climbing area, the color developing area and the holding area share a d...

Embodiment 3

[0046] The device that embodiment 2 obtains takes time as the coordinate semi-quantitative detection of chromium content in soil and carries out chromium content detection test:

[0047] (1) Preparation of standard solution: respectively draw different volumes of chromium standard stock solution in standard volumetric flask, and add 1wt% sulfuric acid-1wt% phosphoric acid solution of volumetric flask volume 10%, dilute to scale, and adjust the pH value to be 7 , shake well, let it stand for 20min, and get chromium ion concentration of 60mg / kg, 65mg / kg, 70mg / kg, 75mg / kg, 80mg / kg, 85mg / kg, 90mg / kg, 120mg / kg, 150mg / kg, 180mg / kg and 200mg / kg solutions.

[0048] (2) Detection: Immerse the immersion area into the solution to be detected, and start timing at the same time. The obtained detection results are shown in Table 1.

[0049] Table 1 Color development time corresponding to different chromium ion concentrations

[0050]

[0051] As can be seen from Table 1, the device fo...

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Abstract

The present invention uses time as a coordinate to semi-quantitatively detect the chromium content in soil. The device and its preparation method include an immersion area, a climbing area, a color development area and a holding area. The climbing area is located in the immersion area and the color development area. between, the color developing area is located between the climbing area and the holding area, the immersion area, the climbing area, the coloring area and the holding area share a detection substrate, the There are water-absorbent fiber layers on the upper and lower surfaces of the detection substrate in the immersion zone and the climbing zone. The color development time of this device has a responsive relationship with the concentration of chromium ions, and can semi-quantitatively detect the concentration of chromium ions in the soil, providing a novel detection method for the detection of chromium ions.

Description

technical field [0001] The present invention relates to soil testing. More specifically, it relates to a device for semi-quantitatively detecting chromium content in soil with time as the coordinate and a preparation method thereof. Background technique [0002] The main forms of Cr in nature are Cr(III) and Cr(VI). Cr(III) is a trace element necessary for the normal metabolism of glycolipids in the human body, while Cr(VI) has high chemical activity, good solubility, and strong oxidation resistance. It is highly permeable to the skin, and its toxicity is more than 100 times that of Cr(III). In 1990, the International Agency for Research on Cancer (IARC) listed Cr(VI) as a human carcinogen, and it is one of the strictly controlled elements in the laws and regulations of various countries such as the EU RoHS Directive. [0003] Chromium exists in the soil in the form of chromate, which mainly comes from inferior cosmetic raw materials, leather preparations, chrome-plated pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24G01N33/245
Inventor 孙晓薇杨伟民金钰于磊钱世江田丽李厚强
Owner 河南省林业科学研究院
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