Passive sensor for in situ detection of amines in atmospheres

  • Universitat de València
  • From Spain
  • Responsive
  • Innovative Products and Technologies

Summary of the technology

 Simplicity and ease of use: it is a passive colorimetric sensor that does not require any kind of pretreatment or power supply or external instrument.
 Low cost: simple fabrication process without high costs
 Low detection limits: suitable for use in real atmospheres, of the order of 3 mg/m3.
 Quantitative detection: direct quantitative detection can be carried out by diffuse reflectance of the sensors.
 Stability: against a wide range of temperatures and to humidity and solar radiation. Reversion resistance.

Description of the tech for sale

Nitrogenous compounds such as ammonia and aliphatic amines are particularly hazardous air pollutants due to its toxic and odorous characteristics. Aliphatic amines found in high concentrations in air are the result of their extensive use in certain types of chemical industry, used for example as raw materials or intermediates in the preparation of fertilizers, pesticides, surfactants, pharmaceuticals, polymers, dyes, etc.. For the determination of amines in situ and in real time, one possibility is to use active sampling techniques, although these techniques often depends on an external source of energy, specific equipment for sampling and, in some cases, energy costs to consider. Regarding passive sensors, there are few options for detecting amines and all have drawbacks such as the need for pretreatment prior to use, or excessively high detection limit, which prevents their use in real atmospheres with low concentration of amines. Researchers at the University of Valencia have developed a passive colorimetric sensor for in situ detection of amines in air with detection limits up to 3 mg/m3, making it suitable to use in the detection of amines in real atmospheres.


The sensor embedded in a malleable and manageable silicone matrix, is a passive sensor which does not require any kind of pre-treatment, or power supply or external instrument. The sensor is further characterized by its safety to the environment, its stability against a wide range of temperatures and to humidity and solar radiation, and its resistance to reversion, so that the sensor response is stable over time.

Main advantages of its use

  • See "New and innovative aspects" section


  • The sensor developed is applicable in personal and collective safety systems, environmental control systems for the detection of aliphatic amines in air, produced in many chemical companies, and for the control of aliphatic amines due to the degradation of foods, especially fish, useful for food industries.

Related Keywords

  • Industrial Technologies
  • Physical Sciences and Exact Sciences
  • Protecting Man and Environment
  • Biological Sciences
  • Materials Technology
  • Clean Industrial Technologies
  • Geothermal Energy Technology
  • Chemistry
  • Industrial Biotechnology
  • Pesticides
  • Sensor Technology related to measurements
  • Safety
  • Environment
  • Industrial Products
  • Medical Health related
  • Genetic Engineering / Molecular Biology
  • Geothermal Energy Market
  • Other Energy
  • Industrial Services
  • Passive Sensor
  • Environment Analysis
  • air quality
  • Industrial Hygiene
  • analytical chemistry
  • Environmental Safety
  • Nitrogenous compounds
  • Ammonia and aliphatic amines

About Universitat de València

The University of Valencia, founded over five centuries ago by the Juries of Valencia, is a modern European public University, open to almost all branches of knowledge: social, economic and legal sciences, Basic experimental sciences, engineering and Tehcniques, health sciences, educational sciences and the humanities.
More than 41,000 undergraduate students, 4,000 postgraduate students, 2,000 students from other universities all over the world, take classes taught by more than 4,000 professors, lectures and researchers at our campuses (more than 440.000 square meters) with the support of over 1,700 administration and service staff.
Our university community is committed to being a university of reference: we are ranked 4º in Europe in receiving Erasmus students and 5ª in sending of students (Ranking Erasmus Mobility); It is fourth spanish university in research at the international level, ranking between 201 and 300, according to Shanghai Jiao Tong University Rankings.
The University of Valencia is working in a wide range of investigative fields. The results of this activity are applied in a variety of productive sectors and social areas. Information of interest for businesses and public bodies about the Scientific and Technological Capacity of the University of Valencia is made available and offered for socioeconomic transfer through its Research Results Transfer Office (OTRI).
The OTRI is a service that manages and assesses in the generation and transfer of University knowledge towards the industry, encouraging the University role as an active agent in the economic and social development; makes easier the access to the University of Valencia research facilities; manage the intellectual property of the research results produced in the University and carry out its valorisation for efficient transfer, and offers orientation of university research groups towards the needs of Business, promoting and guiding effective relationships for exchange of knowledge applied to the needs of social and industrial environment, making easier its information dissemination and transfer.

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