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OPA (o-phthalaldehyde) disinfector concentration range detection test paper

A technology for detecting test paper and disinfectant, which is applied in the field of chemical detection, can solve the problems of unsuitable color difference and misjudgment, and achieve the effect of simple operation, accurate results, and quick and intuitive sterilization

Active Publication Date: 2016-05-04
广州市医德生物科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been reports on the glutaraldehyde concentration test card, the test principle is that glutaraldehyde reacts with sodium sulfite and amino acids to form a yellow substance, but some users think that the color difference is not suitable to distinguish, which may lead to misjudgment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: O-phthalaldehyde disinfectant concentration range detection test paper, the concentration is set to 0.2%.

[0034] pulp modification

[0035] Elemental chlorine-free bleached softwood kraft pulp was first oxidized and modified with 2,2,6,6-tetramethylpiperidone-1-oxyl radical, NaBr and NaClO. The modification conditions were: pulp concentration 1%, 2,2,6,6-Tetramethylpiperidone—1-oxyl radical 0.1mmol / g, NaBr1mmol / g, reaction at room temperature (15-25°C), system pH value 10-11, NaClO addition 0.8 mmol / g, when the pH value no longer decreases, the oxidation reaction is considered to be complete, the oxidized slurry is separated by filtration, washed with deionized water until neutral, and made into 100g / m 2 Paper spare.

[0036] Soaking solution preparation:

[0037] Accurately prepare 10% sodium sulfite solution, and mix it with 1% phenolphthalein absolute ethanol solution to make mother liquor.

[0038] Test paper preparation:

[0039] Soak the prepa...

Embodiment 2

[0042] Embodiment 2: O-phthalaldehyde disinfectant concentration range detection test paper, the concentration is set to 0.3%.

[0043] pulp modification

[0044] Elemental chlorine-free bleached softwood kraft pulp was first oxidized and modified with 2,2,6,6-tetramethylpiperidone-1-oxyl radical, NaBr and NaClO. The modification conditions were: pulp concentration 1%, 2 , 2,6,6-tetramethylpiperidone-1-oxyl radical 0.1mmol / g, NaBr1mmol / g, reaction at room temperature (15-25°C), system pH value 10-11, NaClO addition 2.5mmol / g, when the pH value no longer decreases, the oxidation reaction is considered to be complete, the oxidized slurry is separated by filtration, washed with deionized water until neutral, and made into 100g / m 2 Paper spare.

[0045] Soaking solution preparation:

[0046] Accurately prepare 15% sodium sulfite solution, and mix it with 1% phenolphthalein absolute ethanol solution to make mother liquor.

[0047] Test paper preparation:

[0048] Soak the prepa...

Embodiment 3

[0051] Embodiment 3: O-phthalaldehyde disinfectant concentration range detection test paper, concentration is set to 0.5%.

[0052] pulp modification

[0053] Elemental chlorine-free bleached softwood kraft pulp was first oxidized and modified with 2,2,6,6-tetramethylpiperidone-1-oxyl radical, NaBr and NaClO. The modification conditions were: pulp concentration 1%, 2 , 2,6,6-tetramethylpiperidone-1-oxyl radical 0.1mmol / g, NaBr1mmol / g, reaction at room temperature (15-25°C), system pH value 10-11, NaClO addition 3.1mmol / g, when the pH value no longer decreases, the oxidation reaction is considered to be complete, the oxidized slurry is separated by filtration, washed with deionized water until neutral, and made into 100g / m 2 Paper spare.

[0054] Soaking solution preparation:

[0055] Accurately prepare 20% sodium sulfite solution, and mix it with 2% phenolphthalein absolute ethanol solution to make mother liquor.

[0056] Test paper preparation:

[0057] Soak the prepare...

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PUM

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Abstract

The invention provides test paper for detecting the concentration range of an OPA (o-phthalaldehyde) disinfector. The test paper is manufactured from paper pulp subjected to oxidative modification, and the surface carboxyl group content of the paper pulp is controlled by adjusting modification conditions. The paper is processed step by step through a solution containing sodium sulfite and phenolphthalein, is dried and sheared, and is adhered to a baseplate to obtain the test paper. In a test, after contacting the disinfector for 90 seconds, the test paper becomes red uniformly, indicating that the concentration of OPA reaches a set value of the test paper, otherwise, the test paper does not change color uniformly or is colorless. According to the test paper, the surface carboxyl group content of fiber is controlled by modification of the paper pulp, and then a test card sensitive to different concentration ranges can be manufactured; color development is controlled by fiber modification and is more uniform and stable compared with color development obtained by controlling composition and concentration of a soak solution, thereby meeting the requirement of controlling the concentration of the OPA disinfector used for disinfecting medical instruments. The test paper is simple in operation, can ensure accurate results, and can be used for quickly and intuitively evaluating the disinfecting situation of the disinfector.

Description

technical field [0001] The invention relates to the field of chemical detection, in particular to a test paper for detecting the content of o-phthalaldehyde in an o-phthalaldehyde (OPA) disinfectant. Background technique [0002] The chemical preparations used to kill bacteria are called disinfectants. Ortho-phthalaldehyde is a high-level chemical disinfectant newly developed at home and abroad. It was approved by the US FDA in 1999. In order to ensure the effect of disinfection, it is required that the concentration of phthalaldehyde in the disinfectant should be greater than 0.3%. In practical applications, the concentration range of phthalaldehyde in the disinfectant should be routinely and quickly detected to avoid the concentration drop due to storage or prolonged use and fail. [0003] At present, there are mainly titration methods, ultraviolet spectrophotometry and high performance liquid chromatography for the detection of o-phthalaldehyde content. The titration me...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 曾秀霞张敏刘千钧
Owner 广州市医德生物科技有限责任公司
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