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Detection of DTT and DTTox in medicines by high performance liquid chromatography

 Time of Update: 2022-06-24

used high performance liquid chromatography to simultaneously detect DTT and DTTox in drugs .
Liquid Chromatography Tandem Mass Spectrometry for the Determination of 19 Veterinary Drug Residues in Organic Fertilizers (Draft for Solicitation of Comments)

 Time of Update: 2022-06-22

>>Take Waters Oasis PRiME HLB 60 mg, 3 mL solid phase extraction column, pass 2 mL of the supernatant through the solid phase extraction column, maintain a flow rate of about one drop per second, accurately measure 1 mL
LS/T 6138-2020 Grain and oil inspection. Determination of aflatoxin in grains. Immunomagnetic bead purification ultra-high performance liquid chromatography

 Time of Update: 2022-06-17

/>>4. 17 Volumetric flask (10 mL) . >4. 18 Aflatoxin immunomagnetic beads pretreatment kit: recovery rate ≥85%
Definition of flexible packaging film and introduction of its barrier technology

 Time of Update: 2022-06-15

The plastic film is transparent, flexible, has good water resistance, moisture resistance and gas barrier properties, good mechanical strength, stable chemical properties, oil resistance, easy to print exquisite pictures and texts, and can be heat-sealed to make bags .
UV Identification of Baoxin Tablets, Paper Chromatography Identification of Huazheng Huisheng Tablets and TLC Identification of Niuhuang Jiedu Pills

 Time of Update: 2022-06-15

the filtrate to dryness, add 5ml of 1% hydrochloric acid solution to the residue to dissolve, filter, and add sodium
Inspection of Methanol Amount of Guogong Liquor (Gas Chromatography)

 Time of Update: 2022-06-15

>>Determination method: Precisely measure 1ml of the internal standard solution, put it in a 10ml measuring flask, add the test solution to the mark, shake it up, and use it as the test solution
"An efficient and high-definition fluorescence microscopy method for observing the growth of plant

 Time of Update: 2022-05-18

method for observing the growth of plant pollen tubes in pistils " completed by researchers such as Xu Yuanqing and Luo Zhonglai of the South China Botanical Garden of the Chinese Academy of Sciences
Introduction to the application of gas generators in gas chromatography

 Time of Update: 2022-05-03

of the gas . 　　Secondly, whether the nitrogen generator can be well used in gas chromatography analysis experiments has a lot to do with the principle of the generator
"Determination of Acrylic Acid in Water Quality by Ion Chromatography" Environmental Standard Solicitation for Opinions

 Time of Update: 2022-05-02

　　[ Policies and Regulations of Chemical Machinery

my country develops a specific biosensor comparable to liquid chromatography-tandem mass spectrometry

 Time of Update: 2022-04-30

This study provides a new method and approach for quantitative detection of D-2-HG, which is expected to play an important role in the diagnosis and treatment of D-2-HG-related diseases and the development of targeted drugs .

Song Baoan, deputy to the National People's Congress: China's pesticide creation will definitely catch up with the international leading level

 Time of Update: 2022-04-25

During the "Thirteenth Five-Year Plan" period, China's pesticide creation level and capability have been greatly improved, especially around the pesticide products needed to solve major crop diseases and insect pests in China, pesticide creation has made great progress .

J Thorac Oncol: A definitive predictive system for patients with thoracic malignancies diagnosed with COVID-19

 Time of Update: 2022-04-19

evaluable patients from 18 countries were included in the analysis . The mean observation period was 42 days, with 361 incidents reported, with an all-cause fatality rate of 24. 2%

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.

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 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

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 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 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 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

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