3results about How to "Detection concentration" patented technology

The invention discloses an online calibration optical probe device, and relates to the technical field of optical detection equipment, the online calibration optical probe device comprises a monitoring sample pipeline and a waste discharge pipe, auxiliary connecting frames are symmetrically embedded in the two sides of the monitoring sample pipeline, and an optical emission probe is embedded in the auxiliary connecting frame on the left side. The on-line calibration optical probe device can realize a real-time on-line calibration function in practical application, in the equipment operation process, the optical probe does not need to be removed from a work site, the optical probe can be automatically calibrated by utilizing the interval time of the detection work or according to a preset calibration period, and in the industrial production process monitoring, the real-time on-line calibration of the optical probe can be realized. The optical probe can automatically carry out online calibration once every certain time (such as 1 hour) while the production line continuously runs, so that the accuracy of detection data is ensured, equipment shutdown caused by offline calibration is effectively avoided, the continuity of the production process is ensured, and the working efficiency is remarkably improved.

The utility model relates to the field of flue gas detection, in particular to an environment detection device for flue gas emission, which comprises a filter box, the device is used for discharging and filtering flue gas. According to the environment detection device for flue gas emission, through the arrangement of the filter box, the first frame, the connecting rod, the filter plate, the spring, the second frame, the micro motor, the transmission rod and the abutting block, filtering can be carried out during flue gas detection, and large particles are prevented from being attached to the sensor to affect detection; smoke enters two filter plates in a filter box, particulate matter in the smoke is filtered through the filter plates, blockage of the surfaces of the filter plates is avoided after long-term use, a micro motor switch is turned on to drive a transmission rod to rotate with two external abutting blocks, and the abutting blocks abut against each other back and forth in the rotating process to push the filter plates to move left and right, so that the smoke is filtered out. And the filter plate utilizes an internal penetrating connecting rod and an external spring to rebound, so that the particles blocked on the surface are knocked to fall into a collecting box to be collected in a unified manner.

This invention discloses a camphor-based benzothiazole ratiometric fluorescent probe for detecting hydrazine, its preparation method, and its application. The fluorescent probe is 3-(benzothiazole-2-yl)-4′-methoxy-5-((4,7,7-trimethyl-3-oxo-3-cyclohexylcyclopentenyl)methyl)-1,1′-biphenyl-4-acetate. Starting with camphor, it first undergoes an aldol condensation reaction with 5-bromosalicylic acid; subsequently, a hexamethylenetetramine formylation reaction yields the corresponding benzaldehyde derivative; then, a coupling reaction with 4-morpholinophenylboronic acid forms a biphenyl structure; next, a coupling cyclization reaction with 2-aminothiophenol constructs a benzothiazole structure; finally, an acetyl chloride substitution reaction yields the target fluorescent probe. This compound exhibits a specific reaction with hydrazine, causing a redshift in fluorescence emission wavelength from 506 nm to 613 nm, thereby achieving sensitive detection of hydrazine in solution. This probe has advantages such as good selectivity, low detection limit, and strong anti-interference ability, and has good application prospects in the fields of environmental monitoring and chemical analysis.