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PD CEN/TS 17770:2022 Organic and organo-mineral fertilizers. Determination of the total content of specific elements by ICP-AES after digestion by aqua regia, 2022
- undefined
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Interferences [Go to Page]
- 5.1 General
- 5.2 Spectral interferences
- 5.3 Transport interferences
- 5.4 Excitation interferences
- 5.5 Chemical interferences
- 5.6 Memory interferences
- 6 Reagents [Go to Page]
- 6.1 General
- 6.2 Nitric acid, substance concentration c(HNO3) ≈ 14,3 mol/l; mass concentration ρ ≈ 1,4 g/ml. [Go to Page]
- 6.2.1 Diluted nitric acid solution, c(HNO3) = 5 mol/l.
- 6.3 Hydrochloric acid, c(HCl) ≈ 12 mol/l; ρ ≈ 1,18 g/ml.
- 6.4 Mixed acid solution, 0,8 mol/l nitric acid and 1,8 mol/l hydrochloric acid.
- 6.5 Standard stock solutions, concentration of 1 000 mg/l for each element. [Go to Page]
- 6.5.1 General
- 6.5.2 Standard solution, concentration of 100 mg/l of element.
- 6.5.3 Standard solution, concentration of 10 mg/l of element.
- 6.6 Argon, purity 99,995 % or better.
- 7 Apparatus [Go to Page]
- 7.1 Common laboratory glassware.
- 7.2 Inductively coupled plasma atomic emission spectrometer.
- 8 Procedure [Go to Page]
- 8.1 Preparation of test and blank solution
- 8.2 Preparation of the calibration solutions
- 8.3 Measurement [Go to Page]
- 8.3.1 Instrument conditions
- 8.3.2 Optimization of the instrument conditions
- 8.3.3 Interferences
- 8.3.4 Matrix effects
- 8.3.5 Spiking
- 9 Calculation and expression of the results
- 10 Test report [Go to Page]
