Research on Water Quality Determination of Adsorbable Organic Halogens (AOX)

Introduction

Adsorbable organic halogens (AOX) are a class of organic compounds containing halogens such as chlorine and bromine. Their presence in water poses a serious threat to the environment and human health. Due to its recalcitrant nature, monitoring and analysis of AOX in water environments have become particularly critical.

1、 Overview of Adsorbable Organic Halogens (AOX)

AOX mainly comes from industrial activities, including but not limited to papermaking, textile printing and dyeing, pharmaceuticals, and chemical industries. These compounds are not only difficult to biodegrade, but also have bioaccumulation, posing potential risks to human health through the food chain.

2、 The impact of AOX

1. The impact on human health
   AOX accumulates through the food chain, and long-term exposure may lead to damage to organs such as the liver and kidneys. Some AOX compounds may also damage the ozone layer, posing a threat to global environmental security.

2. Impact on the environment
   AOX emissions cause damage to aquatic ecosystems, affecting the survival of aquatic organisms, and also have adverse effects on soil and atmospheric environment.

3、 AOX detection technology

1. Chemical analysis method
   This method determines the AOX content in water samples through oxidation and solvent extraction processes. It involves separating organic matter, using potassium bromide for oxidation, followed by neutralizing the charge with mercury ions, and ultimately extracting AOX.

2. Instrumental analysis method
   Separate AOX from water samples using adsorbent materials and perform quantitative analysis using instruments such as GC-MS (gas chromatography-mass spectrometry). This technology can simultaneously detect multiple organic halogens.

4、 Measures to ensure the accuracy of testing

1. sampling
   Strictly adhere to sampling standards, pay attention to sampling time and quantity, avoid sample contamination, and ensure sample purity.

2. Sample processing
   Ensure the uniformity of sample processing and follow laboratory operating procedures to improve the accuracy of experiments.

3. Analysis operation
   Strictly follow standard operating procedures for analysis, and for complex operations, refer to advanced experience from other laboratories to ensure the accuracy of results.

   
   

5、 Conclusion

This article reviews the water quality determination methods of AOX and emphasizes its potential hazards to humans and the environment. In order to accurately monitor AOX, strict sampling, sample processing, and analysis procedures must be followed. Through these methods, AOX pollution can be effectively controlled, protecting human health and the ecological environment.

6、 Testing equipment

AOX-C combustion furnace: can quickly and accurately detect various types of organic halogens. Suitable for rapid and accurate analysis of various types of liquid and solid samples, it is an ideal instrument for laboratory organic halogen analysis. According to the "H/JT 83-2001 China Environmental Protection Industry Standard" Determination of Adsorbable Organic Halogens (AOX) in Water Quality by Ion Chromatography Method "and" ISO 9562:1989-09-01 and GB/T 15959-1995 "Determination of Adsorbable Organic Halogens (AOX) in Water Quality by Microculon Method", it is particularly suitable for laboratories that require continuous analysis and testing for a whole day. Easy to use Efficient, only one sample cup or quartz carrier is needed in conjunction with an ion chromatograph or microcoulometer to obtain experimental results.