Unlock instant, AI-driven research and patent intelligence for your innovation.

Formaldehyde detection method

A detection method and formaldehyde technology are applied in the detection field to achieve the effect of strong anti-interference and high sensitivity

Inactive Publication Date: 2019-12-20
杭州飞秒检测技术有限公司
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some analytes that are unstable under alkaline or acidic conditions, the detection by the above method will obviously produce large errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Formaldehyde detection method
  • Formaldehyde detection method
  • Formaldehyde detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The molecular structure of the fluorescent chromogenic agent of the present embodiment is shown in formula I:

[0026]

[0027] The H NMR spectrum of the compound is shown in image 3 shown.

[0028] The preparation method of the fluorescent chromogenic agent of the present embodiment is to dissolve 120mg (0.21mmol) of the compound of the structure shown in formula II in 10mL of tetrahydrofuran, and then add 100mg (0.65mmol) of p-nitrobenzaldehyde, 100 μL ( 1.6mmol) of glacial acetic acid and 180mg (0.9mmol) of sodium triacetate borohydride were stirred at room temperature for 18 hours. Glacial acetic acid, as a co-solvent for p-nitrobenzaldehyde, is beneficial to promote the mixing of p-nitrobenzaldehyde and other substances. The reaction formula is as follows:

[0029]

[0030] After the reaction was completed, pour 50 mL of saturated sodium bicarbonate solution, extract 4 times with 30 mL of ethyl acetate, and dry the organic phase in vacuum. Wash with wate...

Embodiment 2

[0035] The preparation method of the fluorescent chromogen of the present embodiment is to dissolve 120mg (0.21mmol) of the compound of the structure shown in formula II in 10mL of tetrahydrofuran, and then add 100mg (0.65mmol) of p-nitrobenzaldehyde 180mg (0.9 mmol) of sodium triacetate borohydride, stirred at room temperature for 18 hours. After the reaction was completed, pour 50 mL of saturated sodium bicarbonate solution, extract 4 times with 30 mL of ethyl acetate, and dry the organic phase in vacuum. Wash with water, methanol, and anhydrous ether several times. Vacuum dry. The yield was 70%.

Embodiment 3

[0037] The preparation method of the fluorescent chromogen of the present embodiment is to dissolve 120mg (0.21mmol) of the compound of the structure shown in formula II in 10mL of tetrahydrofuran, and then add 50 (0.325mmol) of p-nitrobenzaldehyde, 100 μL ( 1.6mmol) of glacial acetic acid and 180mg (0.9mmol) of sodium triacetate borohydride were stirred at room temperature for 18 hours. After the reaction was completed, pour 50 mL of saturated sodium bicarbonate solution, extract 4 times with 30 mL of ethyl acetate, and dry the organic phase in vacuum. Wash with water, methanol, and anhydrous ether several times. Vacuum dry. The yield was 70%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a formaldehyde detection method. A compound with the structure represented by formula I is used as a fluorescent developer of saccharin sodium. The formaldehyde detection method has the advantages of convenience, easiness, high sensitivity and high anti-interference, and the method can detect formaldehyde rapidly.

Description

technical field [0001] The invention relates to a method for detecting formaldehyde by using fluorescent color development, and belongs to the technical field of detection. Background technique [0002] Formaldehyde is widely used in food industry, textile industry, construction industry, chemical engineering and pharmaceutical engineering and other fields. However, excessive intake of exogenous formaldehyde will seriously endanger human health. In 2004, formaldehyde was identified as a class 1 carcinogen by the International Agency for Research on Cancer (IARC). The International Agency for Research on Cancer (IARC) of the World Health Organization announced in its publication No. 153 in June 2004 that formaldehyde was upgraded from a Class 2 carcinogen to a Class 1 carcinogen. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, nasopharyngeal cancer, colon cancer, brain tumors, and nuclear gene mutations. Therefore, it is particularly imp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C07D471/16C09K11/06
CPCC07D471/16C09K11/06C09K2211/1029C09K2211/1059G01N21/643
Inventor 张雨菲区升举文杨明葛春
Owner 杭州飞秒检测技术有限公司