(6) Analysis and testing
1.
Instrument tuning
After
Soil and sediment aqua regia extraction-inductively coupled plasma mass spectrometry (2)
Time of Update: 2022-03-01
(5) Pre-processing and interference elimination
1.
Pre-treatment
Determination of metal elements in solid waste by inductively coupled plasma mass spectrometry (3)
Time of Update: 2022-03-01
(7) Interference elimination
1.
Mass spectrum interference
Determination of metal elements in solid waste by inductively coupled plasma mass spectrometry (2)
Time of Update: 2022-03-01
(6) Analysis and testing
1.
Measurement results
(1
Soil and sediment aqua regia extraction-inductively coupled plasma mass spectrometry (1)
Time of Update: 2022-03-01
(1) Scope of application
Suitable for cadmium (Cd), cobalt (Co), copper (Cu), chromium (Cr
Soil and sediment aqua regia extraction-inductively coupled plasma mass spectrometry (4)
Time of Update: 2022-02-27
is obviously greater than 5% . >(4) The sample is digested without adding hydrofluoric acid , which is an incomplete
Determination of Polycyclic Aromatic Hydrocarbons in Soils and Sediments Gas Chromatography-Mass Spectrometry (1)
Time of Update: 2022-02-26
. Reagents and materials>Unless otherwise stated, the analysis is performed with superior grade pure chemical reagents that meet the national standards, and the experimental water is newly prepared ultrapure
Inventory of PX projects that have been stopped by the masses in China in recent years
Time of Update: 2022-02-26
On May 10, 2016, amidst turbulent opposition from citizens, the Longkou Municipal Government of Yantai City, Shandong Province halted the EIA work of the Yulong Petrochemical Industrial Base .
Determination of Phthalates in Soil by Gas Chromatography/Mass Spectrometry (2)
Time of Update: 2022-02-26
The retention time of the compound obtained under the conditions of the reference instrument on the HP-5MSUI chromatographic column is shown in Table 7-4 .
Determination of Phthalic Acid Esters in Soil by Gas Chromatography/Mass Spectrometry (1)
Time of Update: 2022-02-26
, the analysis is performed with superior grade pure chemical reagents that meet the national standards, and the experimental water is newly prepared ultrapure water . >(1)
-
-
-
-
-
-
-
-
-
Determination of Phthalate Esters in Soil Gas Chromatography/Mass Spectrometry (3)
Time of Update: 2022-02-26
(2) The final mass concentration of the sample is calculated based on the mass of soil dry matter .
Determination of Polycyclic Aromatic Hydrocarbons in Soil and Sediment Gas Chromatography-Mass Spectrometry (2)
Time of Update: 2022-02-26
Table 7-6 Retention time and qualitative and quantitative reference ions Related Links: Determination of Polycyclic Aromatic Hydrocarbons in Soils and Sediments Gas Chromatography-Mass Spectrometry (1)
Determination of 65 kinds of volatile organic compounds in soil and sediments. Purge and trap gas chromatography-mass spectrometry (1)
Time of Update: 2022-02-25
(5) Mixed standard solution of volatile organic compounds: p=1000ug/mL, and the solvent is methanol .
Determination of 60 semi-volatile organic compounds in soils and sediments by gas chromatography-mass spectrometry (2)
Time of Update: 2022-02-25
Table 7-9 Retention time and qualitative and quantitative reference ions Related Links: Determination of 60 Semi-volatile Organic Compounds in Soil and Sediment Gas Chromatography-Mass Spectrometry (1)
Soil and sediments. Determination of dioxins. Isotope dilution high resolution gas chromatography-high resolution mass spectrometry (2)
Time of Update: 2022-02-25
Table 7-10 Retention time and quantitative qualitative ion of each compound (3) Calibration curveTake five standard solutions of EPA-1613CS1, EPA-1613CS2, EPA-1613CS3, EPA-1613CS4, and EPA-1613CS5, directly inject the sample for analysis, and quantify with the internal standard relative response factor method.
Soil and sediments. Determination of polychlorinated biphenyls. Gas chromatography-mass spectrometry (2)
Time of Update: 2022-02-25
Five, pre-treatment>(1) Sample preparation>Determination of organochlorine pesticides in soils and sediments by gas
Determination of dioxins in soil and sediments. Isotope dilution high resolution gas chromatography-high resolution mass spectrometry (1)
Time of Update: 2022-02-25
Then use 16 mL of dichloromethane-n-hexane (60/40) (V/V) solvent with a volume ratio of 6:4 to clean the alumina column several times, and collect the eluent into a sample bottle.
Soil and sediment determination of polychlorinated biphenyls gas chromatography-mass spectrometry (1)
Time of Update: 2022-02-25
Second, the principle of the methodUse pressurized fluid extraction method to extract PCBs in soil or sediments, and select appropriate purification methods (concentrated sulfuric acid sulfonation, copper powder desulfurization, Flori silica column, silica gel column, etc.
Soil and sediments. Determination of dioxins. Isotope dilution high resolution gas chromatography-high resolution mass spectrometry (3)
Time of Update: 2022-02-25
retention time window, and their abundance ratios are consistent with the theoretical ion abundance ratios listed in Table 4 of HJ 77. 4-2008, and the relative deviation is less than 15% .
-
Determination of 60 semi-volatile organic compounds in soils and sediments by gas chromatography-mass spectrometry (1)
Time of Update: 2022-02-25
Second, the principle of the methodUsing pressurized fluid extraction, the semi-volatile organic compounds in the sample are extracted with a mixed solvent of dichloromethane and acetone , and the extract is processed by concentration, purification, etc.
Welcome to ECHEMI
