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(1) Scope of application
Suitable for cadmium (Cd), cobalt (Co), copper (Cu), chromium (Cr), manganese (Mn), nickel (Ni), lead (Pb), zinc (Zn), vanadium (V) in soil and sediment ), arsenic (As), aluminum (Mo), antimony (Sb), a total of 12 metal elements
Table 5-44 Method detection limit and lower limit of determination specified in HJ803-2016
(2) Method principle
After the soil and sediment samples are digested with a mixed solution of hydrochloric acid / nitric acid (aqua regia) by an electric hot plate or a microwave digester, they are detected by an inductively coupled plasma mass spectrometer
(3) Reagents and materials
Unless otherwise specified, the analysis uses pure reagents that meet the national standards
(1) Hydrochloric acid : p(HCl)=1.
(2) Hydrochloric acid-nitric acid solution: 3+1 (ie industrial water)
(3) Nitric acid solution: c(HNO 3 )=0.
(4) Nitric acid solution: 2+98
(5) Nitric acid solution: 1+4
(6) Slow quantitative filter paper
(7) Carrier gas: Argon, purity ≥99.
(4) Instruments and equipment
(1) Inductively coupled plasma mass spectrometer: The mass range that can be scanned is 5 to 250 amu, and the peak width at 10% of the peak height should be 0.
(2) Temperature control electric heating plate: The control accuracy is ±0.
(3) Microwave digestion instrument: output power 1000~1600W
(4) Analytical balance: the accuracy is 0.
(5) Teflon closed digestion tank: it is resistant to pressure, acid and corrosion, and has a pressure relief function
(6) Centrifuge
.
(7) general laboratory equipment and instruments used, including conical flask, funnel glass, flask, nylon sieve
.
Related Links: Determination of Metal Elements in Solid Waste by Inductively Coupled Plasma Mass Spectrometry (4)