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Related Concept Videos

Testing Water Quality01:14

Testing Water Quality

309
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
309

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A MEMS-Based Multi-Parameter Integrated Chip and Its Portable System for Water Quality Detection.

Ziyue Wu1,2, Jiaqi Wang1,2, Chao Bian1

  • 1State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.

Micromachines
|January 18, 2020
PubMed
Summary

This study presents a portable, multi-parameter water quality detection system using a micro-electro-mechanical system (MEMS) integrated chip. The system accurately measures temperature, pH, ORP, conductivity, and copper ions, offering a low-cost, sensitive solution for water resource protection.

Keywords:
multi-parameterportable systemwater quality detection

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Area of Science:

  • Environmental Science
  • Sensor Technology
  • Materials Science

Background:

  • Water quality monitoring is crucial for environmental protection and public health.
  • Micro-electro-mechanical system (MEMS) technology offers advantages for developing compact, cost-effective sensors.
  • Existing water quality detection methods can be limited by size, cost, or portability.

Purpose of the Study:

  • To develop and evaluate a portable multi-parameter water quality detection system.
  • To integrate a MEMS-based sensor chip for simultaneous measurement of key water quality parameters.
  • To assess the performance and accuracy of the developed system.

Main Methods:

  • Fabrication of a multi-parameter integrated sensor chip using MEMS technology.
  • Development of a portable system incorporating the MEMS chip.
  • Calibration of the sensor for temperature, pH, oxidation-reduction potential (ORP), conductivity, and copper ion (Cu2+) detection using standard solutions.
  • Characterization of sensor performance, including sensitivity, linearity, detection limit, and accuracy.

Main Results:

  • The system achieved high sensitivity for pH (-57.34 mV/pH) and temperature (5.95 Ω/°C).
  • ORP detection showed a relative error of less than 3%.
  • Conductivity detection exhibited excellent linearity (0.9995) with an electrode constant of 1.416 cm⁻¹.
  • Copper ion detection demonstrated good linearity (0-0.6 mg/L) with a low detection limit (2.33 μg/L).
  • The overall accuracy of the portable system was within 4%.

Conclusions:

  • The developed portable multi-parameter water quality detection system, based on a MEMS integrated chip, is effective for rapid and accurate water quality assessment.
  • The system's low cost, small size, and high sensitivity make it suitable for widespread application in water resource protection.
  • This technology shows significant potential for field-based, real-time water quality monitoring.