. The standard solutions, preparations and products used in the analysis are prepared in accordance with GB/T601-2002 and GB/T603-2002 when other requirements are not specified
1,6-Hexanediamine for industrial use (2)
Time of Update: 2021-09-26
4. 1 Method summaryUse methyl red as indicator and titrate with hydrochloric acid standard titration solution .
Industrial cyclohexene (2)
Time of Update: 2021-09-25
3. 1 Method summaryUsing gas chromatography, under selected working conditions, the sample is vaporized and passed through a capillary chromatographic column to separate its components, and detected by a hydrogen flame ionization detector.
Cyclohexanol for industrial use (2)
Time of Update: 2021-09-25
> a flammable product, so pay attention to safety during analysis . >5. 2 General provisions>Unless otherwise specified, only reagents confirmed
Dimethyl sulfate for industrial use (2)
Time of Update: 2021-09-25
4. 1 Method summaryTitrate free sulfuric acid in dimethyl sulfate with potassium hydroxide -ethanol standard titration solution .
Jianghan Oil Region's production and construction well Guang 43 oblique -2 well encountered a 15-meter thick oil layer
Time of Update: 2021-09-25
Sinopec News Network reported on March 22 that the first production well Guang 43 Incline-2 well deployed by the Geological Research Institute of Jianghan Oil Production Plant of Jianghan Oilfield in the old area of Guangbei was successfully completed.
Trimethylolpropane for industrial use (2)
Time of Update: 2021-09-23
workstation;>4. 2. 3. 3 Sample preparation bottle: stopcock with rubber septum;>4. 2. 3. 4 Sample injector: 1uL glass syringe
One-time use calcium carbide packaging steel drum (2)
Time of Update: 2021-09-22
3 The exterior paint of the steel drum adopts materials with strong adhesion, weather adaptability and durability .
Repetitive use of calcium carbide packaging steel drums (Appendix A 2)
Time of Update: 2021-09-22
1 The shape and size of the reinforcement ring should meet the requirements of Figure A.
Error analysis and data processing of water quality analysis results (2)
Time of Update: 2021-09-22
Once the experimental conditions have changed, or there is a gross error in the experiment, the resulting measurement data will deviate from the normal data distribution group, that is, outlier data with greater dispersion will appear .
Titration Analysis Method-Coordination Titration Method (2)
Time of Update: 2021-09-22
The chemical formula of the titration reaction is At the stoichiometric point, all the metal ions have reacted completely.
Repetitive use of calcium carbide packaging steel drums (2)
Time of Update: 2021-09-22
3. 1 The thickness of the paint film shall be measured according to the method of GB/T13452.
Titration analysis method-oxidation-reduction titration method (2)
Time of Update: 2021-09-22
In the redox titration process, the color change of the indicator near the stoichiometric point can be used to indicate the end point of the titration .
Application of spectrophotometry in water quality analysis (2)
Time of Update: 2021-09-21
DPD reacts rapidly with free residual chlorine in water to produce red color.
Spectrophotometry (2)
Time of Update: 2021-09-21
But as far as its structure is concerned, it is composed of a light source, a light splitting system (monochromator), an absorption cell (a cuvette), a detector and a signal display system .
Brief introduction of large-scale instrument analysis method-gas chromatography (2)
Time of Update: 2021-09-21
Chromatographic quantitative methods include calibration area normalization method, internal standard method and external standard method .
Microbiological Analysis of Water (2)
Time of Update: 2021-09-21
a. Use aseptic method to draw 1ml of thoroughly mixed water sample, pour it into a test tube containing 9ml of sterile water, and mix to form a 1:10 dilution .
Titration analysis method-acid-base titration (2)
Time of Update: 2021-09-21
2. Selection of acid-base titration curve and indicator>To use acid-base titration for analysis and determination, it is necessary to understand
Determination of 9 Penicillin Residues in Livestock and Poultry Meat-Selection of Analysis Conditions (2)
Time of Update: 2021-09-20
Source, using positive ion detection method to perform primary mass spectrometry analysis (Q1 scan) of 9 penicillins, and the protonated molecular ion peaks are 366, 350, 518, 335, 351, 402, 436, 415, and 470, respectively.
