Rapid determination of trans fatty acids in instant drinks (gas chromatography)
Time of Update: 2022-03-17
The detection methods of trans fatty acids mainly include infrared spectroscopy (IR), anion thin layer chromatography (Ag-TLC), gas chromatography (GC), etc.
Determination of Alkyl Mercury in Solid Waste Leachate Purge and Trap/Gas Chromatography-Cold Atomic Fluorescence Method (1)
Time of Update: 2022-03-12
Five, pre-treatment(1) Preparation of leaching solution"Semi-Volatile Organic Compound Analysis Technology-Preparation of Sulfuric Acid and Nitric Acid from Leachate"(2) Steaming letterAccurately measure 45mL pure water (or sample, need to add 0.
Solid waste leachate-determination of organochlorine pesticides-gas chromatography (1)
Time of Update: 2022-03-12
Acid and Nitric Acid from Leachate">(2) Extraction>Take 100 mL of the extract in a separatory funnel, add 5 g of sodium chloride, shake, shake, and then add 20 mL of dichloromethane
Determination of Alkyl Mercury in Solid Waste Leachate Purge and Trap/Gas Chromatography-Cold Atomic Fluorescence Method (2)
Time of Update: 2022-03-12
0 pg/L, 100 pg/L) that meet the detection limit of the instrument, linear range and actual sample mass concentration, and quantify by external standard method .
Solid Waste—Determination of Organophosphorus Pesticides—Gas Chromatography (1)
Time of Update: 2022-03-10
>>"Semi-Volatile Organic Compound Analysis Technology-Preparation of Sulfuric Acid and Nitric Acid from Leachate">2. Picking>Take 100 mL
Solid waste leachate-determination of polychlorinated biphenyls-gas chromatography (2)
Time of Update: 2022-03-10
0ug/L, 100ug/L, 200ug/L, 500ug/L) that meets the instrument's detection limit, linear range and actual sample mass concentration, add Add a substitute for the same product (such as 100ug/L), dilute with n-hexane , and quantify by internal standard method .
Determination of 13 semi-volatile organic compounds in solid waste leachate-gas chromatography-mass spectrometry (2)
Time of Update: 2022-03-10
Use the average relative response factor to establish a calibration curveThe relative response factor RRF i of the target in the ith point of the standard series is calculated according to formula (1) .
Solid waste leachate-determination of polychlorinated biphenyls-gas chromatography (1)
Time of Update: 2022-03-10
Second, the principle of the methodUse dichloromethane to extract PCBs in the leachate, purify with concentrated sulfuric acid , and analyze PCBs in the sample by gas chromatography electron capture detector method (GC-ECD).
Solid waste leachate—Determination of chlordane—gas chromatography (2)
Time of Update: 2022-03-10
: nitrogen, purity ≥99. 999%, constant pressure mode: flow rate is 1. 0mL/min; detector temperature: 300℃ . >The chromatographic column connected to the forward inlet
Solid Waste—Determination of Organophosphorus Pesticides—Gas Chromatography (2)
Time of Update: 2022-03-10
)>Injection port temperature: 230℃; sampling mode: split injection, split ratio: 10:1; constant pressure mode: flow rate 1. 0mL/min . >>
-
Solid waste leachate—Determination of Toxaphene—Gas Chromatography (2)
Time of Update: 2022-03-10
>. >>Carrier gas: nitrogen, purity ≥99. 999%; constant pressure mode: flow rate of 1. 0mL/min; detector temperature: 300℃ . >
-
-
-
-
-
Solid waste leachate-determination of organochlorine pesticides-gas chromatography (2)
Time of Update: 2022-03-10
Six, analysis and testing(1) Reference conditions of gas chromatography (for reference only, can be adjusted appropriately according to the actual instrument)Inlet temperature: 250%:, sampling method: split injection, split ratio is 10:1, constant pressure control, injection volume is 1uL .
Solid waste leachate—Determination of Chlordane—Gas Chromatography (1)
Time of Update: 2022-03-10
>>(1) Preparation of solid waste leachate>"Semi-Volatile Organic Compound Analysis Technology-Preparation of Sulfuric Acid and Nitric Acid from Leachate">(2
Solid waste leachate—Determination of Toxaphene—Gas Chromatography (1)
Time of Update: 2022-03-10
waste leachate>"Semi-Volatile Organic Compound Analysis Technology-Preparation of Sulfuric Acid and Nitric Acid from Leachate">(2) Extraction>Take
Solid Waste-Determination of Dioxins-Isotope Dilution High Resolution-Gas Chromatography-High Resolution Mass Spectrometry (1)
Time of Update: 2022-03-10
Then use 16 mL of dichloromethane-n-hexane solvent with a volume ratio of 6:4 to clean the alumina column several times, collect the eluent into a sample bottle, and blow the eluent to nearly dry with nitrogen .
Determination of 13 semi-volatile organic compounds in solid waste leachate-gas chromatography-mass spectrometry (1)
Time of Update: 2022-03-10
>(1) Preparation of solid waste leachate (refer to HJ/T299)>"Semi-Volatile Organic Compound Analysis Technology-Preparation of Sulfuric Acid and Nitric Acid from Leachate">
-
-
-
Determination of 37 Volatile Organic Compounds/35 Volatile Halogenated Hydrocarbons in Solid Waste Headspace/Gas Chromatography-Mass Spectrometry (3)
Time of Update: 2022-03-09
Use the average relative response factor to establish a calibration curveThe relative response factor RRF i of the target (or substitute) in the ith point of the standard series is calculated according to formula (1) .
Solid waste. Determination of volatile halogenated hydrocarbons. 35 VOCs purge and trap/gas chromatography-mass spectrometry (3)
Time of Update: 2022-03-09
(2) Use the average relative response factor to establish a calibration curveThe relative response factor RRF i of the target (or substitute) in the ith point of the standard series is calculated according to formula (1) .
Determination of 37 Volatile Organic Compounds/35 Volatile Halogenated Hydrocarbons in Solid Waste Headspace/Gas Chromatography-Mass Spectrometry (1)
Time of Update: 2022-03-09
Add the internal standard solution and the substitute solution (same as the low-content sample step), immediately seal, and oscillate on a shaker at a frequency of 150 times/min for 10 minutes, and wait for the headspace-CC/MS detection .
