Wen LI, Li-min WANG, Li CHENG, Hai-qi CHEN. Sequential Injection-Continuous Spectroscopy Based Multi-Parameter Method for Water Quality Analysis[J]. Spectroscopy and Spectral Analysis, 2021, 41(2): 612
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 2, 612 (2021)
Fig. 1. Wavelength-absorption peak graph
(a): Nitrite nitrogen; (b): Nitrate nitrogen (total nitrogen); (c): Total phosphorus
(a): Nitrite nitrogen; (b): Nitrate nitrogen (total nitrogen); (c): Total phosphorus
Fig. 2. Schematic diagram of digestion pool
Fig. 3. Schematic diagram of sequential injection spectroscopy platform
Fig. 4. Detection flowchart
Fig. 5. Concentration-absorbance curve
(a): Nitrite nitrogen; (b): Nitrate nitrogen; (c): Total nitrogen; (d): Total phosphorus
(a): Nitrite nitrogen; (b): Nitrate nitrogen; (c): Total nitrogen; (d): Total phosphorus
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Table 1. Comparison of nitrite nitrogen and nitrate nitrogen repeatability (RSD)
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Table 2. Comparison of total nitrogen and phosphorus repeatability (RSD)
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Table 3. Reagent dosage comparison and detection limit
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