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Solution to the uneven temperature control of small high and low temperature cycle test device

 Time of Update: 2022-05-05

4. The sealing of the box is not good, such as air leakage, which affects the uniform temperature field during work .
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (4)

 Time of Update: 2021-12-11

4. 2 Drawing standard curveWeigh cobalt acetate tetrahydrate , manganese acetate tetrahydrate , hydrobromic acid, and water according to the mass fraction ratio of each component in Table 2 , to the nearest 0.
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (3)

 Time of Update: 2021-12-11

Use a mixture of water, nitric acid and glacial acetic acid as the titration medium, use dichloromethane as the precipitation flocculant, use ferric ammonium sulfate as the indicator, and titrate with potassium thiocyanate standard titration solution .
Industrial methylamine aqueous solution test method (1)

 Time of Update: 2021-12-11

2. 1 Method summaryThe first step uses hydrochloric acid standard titration solution to determine the total alkalinity of the methylamine aqueous solution; the second step uses gas chromatography to determine the impurities in the solution .
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (2)

 Time of Update: 2021-12-11

5 Result calculationThe mass fraction w 1 of manganese (Mn 2+ ) content , expressed in %, is calculated according to formula (1): Where:V— The value of the volume of the standard titration solution (3.
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (5)

 Time of Update: 2021-12-11

The amount of chloride (CI) standard solution added should be determined according to the limit value of the amide content of the sample.
Industrial methylamine aqueous solution test method (3)

 Time of Update: 2021-12-11

>. >3. 2. 3. 5. 4 Determination>Under the same operating conditions as the analytical standard, use a micro syringe to inject 2uL of the sample from
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (1)

 Time of Update: 2021-12-11

1 ScopeThis standard specifies the cobalt acetate , manganese acetate , hydrobromic test method of mixing catalyst solution .
Industrial methylamine aqueous solution test method (2)

 Time of Update: 2021-12-11

1 Method summaryThe impurity of methylamine aqueous solution was determined by gas chromatography , detected by thermal conductivity detector, and quantified by external standard method .
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (7)

 Time of Update: 2021-12-09

3. 2 Preparation of standard colorimetric solutionAccurately pipette appropriate amount of copper (Cu 2+ ) standard solution, place it in a 250mL separatory funnel, add 15mL nitric acid, 5mL ammonium citrate solution, 10mL ammonia, add (10±0.
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (6)

 Time of Update: 2021-12-09

> ) content>3. 10. 1 Method summary>In an acidic medium, barium ions and sulfate ions in the sample produce insoluble barium
Test method for mixed catalyst solution of cobalt acetate, manganese acetate and hydrobromic acid (8)

 Time of Update: 2021-12-09

3. 14 Determination method of determination limit value of iron (Fe 3+ ) content
The gospel of food testing workers-Primerdesign qPCR complete solution

 Time of Update: 2021-08-09

In terms of food & beverage safety testing, it owns ~100 genesig quantitative PCR test kits (genesig STANDARD & ADVANCED kit), which can complete meat authenticity, fry identification, screening of contaminated microorganisms, and allergen testing in about 2 hours .
Q-Lab Ultraviolet Irradiance Test Chamber

 Time of Update: 2021-04-29

Box cover material: stainless steel plate spray treatment ;, box cover material: stainless steel plate spray treatment ;4 , were mounted on both sides of the chamber .
Clin Lab: Blood tests have identified COVID-19-end biomarkers

 Time of Update: 2020-12-18

8, 2020 // -- Researchers at the Seville Institute for Biomedical Research (IBIS) presented a study conducted in the Clinical Biochemistry Service at The University Hospital of Virgin del Rocio, which identified six biomarkers indicating
Clinical Nutrition: Four-grind soup oral solution and dopamine suspension assist the helix nasal

 Time of Update: 2020-09-19

conclusion: the effect of the four-grind soup oral solution assisting the helical nasal intestinal tube helium rear tube is not inferior to that of multipanlitone suspension has not been confirmed.
CLIN CHEM LAB MED: Changes in immunofluorescence test results for HEp-2 cell antinuclear antibodies

 Time of Update: 2020-08-24

all subjects assessed the HEp-2 IFA titration and staining patterns, as well as the traditional parameters of nine SLE disease activities.
Visit the new coronavirus nucleic acid testing lab: technology to make the virus nowhere to hide

 Time of Update: 2020-05-28

On May 25, Changjiang Daily reporter visited three new coronavirus nucleic acid testing laboratories in Wuhan to explore the follow-up testing process for readers.
Solution and test instrument for broken syringe glass bottle

 Time of Update: 2017-12-15

It can be tested with yly-05 glass bottle polarizing stress meter produced by Jinan Saicheng.
The test method and solution of electronic components sealing

 Time of Update: 2017-11-10

Taking mfy-02 sealing tester of Jinan Saicheng as an example, this paper makes a special test on whether there is leakage of electronic components produced by a manufacturer under vacuum.

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