Prix FOB
Obtenir le dernier prix( Negotiable )
|500 Gram Minimum Order
Pays:
China
N ° de modèle:
DS-TRIS-05
Prix FOB:
( Negotiable ) Obtenir le dernier prix
Localité:
Ezhou city,Hubei province,china
Prix de commande minimale:
-
Commande minimale:
500 Gram
Packaging Detail:
500g / bottle, 25kg / barrel
Heure de livraison:
5 days
Capacité de Fournir:
100 Ton per Month
Payment Type:
T/T, L/C, PayPal, Other
Groupe de produits :
Personne àcontacter jing zhao
Business Address:C8-2, Optics Valley United Technology City, Huarong District, Ezhou, Hubei
Tris is a weak base with a
wide range of uses. It can be used in biological buffers,
biopharmaceuticals, coatings, new composite materials, etc. Sodium
carbonate is the reference substance for titration calibration of
acid concentration, but it has some shortcomings, and Tris can be
used as a supplement to sodium carbonate reference substance to
replace it for titration calibration of acid
concentration.
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Experiment preparation and
equipment:
Hydrochloric acid:
analytically pure; sulfuric acid: analytically pure; sodium
carbonate: reference reagent; Tris: reference reagent; methyl
red-cresol green ethanol solution. Potentiometric titrator, Lab X
workstation, composite pH electrode; muffle furnace; *0mL acid
burette and other general laboratory utensils.
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Use Tris and sodium carbonate
to titrate hydrochloric acid or sulfuric acid
separately:
Manual titration: Weigh the
standard reagent Tris (constant weight at **0 degrees Celsius) or
anhydrous sodium carbonate (constant weight at ******0 degrees
Celsius) which consumes about ****0 mL of the sulfuric acid or
hydrochloric acid titration solution to be calibrated, weigh to
0.***1g, and dissolve in Add *0 drops of bromocresol green-methyl
red indicator to a **0mL Erlenmeyer flask containing *0~**0mL of
water, and change the acid solution to be calibrated from green to
dark red. Boil for 2min. After cooling, continue to titrate until
the solution just changes color ( Light gray). Do a blank test for
the acid standard titration solution of not more than 0.1mol/L at
the same time.
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Automatic potentiometric
titration: Fix the titration cup containing the reference anhydrous
sodium carbonate or Tris aqueous solution on the titration stand,
connect the PH composite electrode, set the appropriate titration
parameters of the automatic potentiometer, and start the titration
program to automatically titrate to the end point. (It is
appropriate to consume sulfuric acid or hydrochloric acid titrant
2. ~ *0mL). At the same time, make a blank test.
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Compared with manual
titration, automatic potentiometric titration has more advantages.
Manual titration adopts calibration indicator. The selection is
based on the sudden change in the pH value of the solution near the
stoichiometric point of the titrant. The end point is judged by the
color change of the indicator, and the color range is affected by
different concentrations. The acid content and the quality of the
reference material vary. Usually, the indicator method must be used
to calibrate the end point color by the potentiometric
method.
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Potentiometric titration is
based on potential mutation sites. The potential mutation sites of
Tris are more prominent and single, while sodium carbonate has
multiple interference mutation sites. Tris potential titration has
more advantages in calibrating acid concentration. Desheng has a
large-scale Tris production line, and its products are stable and
guaranteed.
| Pays: | China |
| N ° de modèle: | DS-TRIS-05 |
| Prix FOB: | ( Negotiable ) Obtenir le dernier prix |
| Localité: | Ezhou city,Hubei province,china |
| Prix de commande minimale: | - |
| Commande minimale: | 500 Gram |
| Packaging Detail: | 500g / bottle, 25kg / barrel |
| Heure de livraison: | 5 days |
| Capacité de Fournir: | 100 Ton per Month |
| Payment Type: | T/T, L/C, PayPal, Other |
| Groupe de produits : | Tris(Hydroxymethyl)Aminomethane |
