What is Calibrated Glassware Machine?

Calibrated Glassware

Calibrated Glassware – Read about Pressure Gauges Calibration Apparatus

1 Beakers of different sizes Different sizes, Clibrated
2 Conical flasks of different sizes Different sizes, Clibrated
3 Vaccum filtration assembly Different sizes, Clibrated
4 Graduated cylinders of different sizes Different sizes, Clibrated
5 Test tube stands of different sizes with stands Different sizes, Clibrated
6 Funnels of different sizes Different sizes, Clibrated
7 Burretts of different sizes Different sizes, Clibrated
8 Pippetts of different sizes Different sizes, Clibrated
9 Dropers of different sizes Different sizes, Clibrated
10 Molar flasks of different sizes Different sizes, Clibrated
11 Bottles and jars of different sizes Different sizes, Clibrated
12 Ptri dishes of different sizes Different sizes, Clibrated
13 Stirrers Different sizes, Clibrated
14 Crucible of different sizes Different sizes, Clibrated
15 Watch glasses Different sizes, Clibrated
16 Separatory funnels of different sizes Different sizes, Clibrated
17 Condensers of different sizes Different sizes, Clibrated
18 Boiling flasks of different sizes Different sizes, Clibrated
19 Buchner Funnel of different sizes Different sizes, Clibrated
20 Thermometers Different sizes, Clibrated
21 Centrifuge Tubes Different sizes, Clibrated
22 Gas syringes of different sizes Different sizes, Clibrated
23 Heat exchangers Different sizes, Clibrated
24 Soxhlet Extractors Different sizes, Clibrated
25 Cuvettes Different sizes, Clibrated
26 Desiccators Different sizes, Clibrated
27 Evaporating dishes Different sizes, Clibrated
28 Sublimation apparatus Different sizes, Clibrated
29 Ubbelohde viscometer Different sizes, Clibrated
30 Vial Different sizes, Clibrated
31 Wash bottle Different sizes, Clibrated
32 Weighing bottle Different sizes, Clibrated
33 Distillation apparatus Different sizes, Clibrated

Determination of calcium carbonate dispersing power (threshold effect)

Principle

The products to be tested are titrated with a calcium acetate solution in the presence of carbonate ions.
The amount of calcium carbonate inhibited per gram of test product is calculated.
The test provides an indication of the strength of the threshold effect (CaCO3 dispersing power) of chemicals based on polyacrylic acids.

Chemicals and apparatus

Glassware: 250-ml beakers (not less than 3 per test substance),
several pipettes, measuring cylinders, etc.

Chemicals: sodum carbonate (soda) 2 % solution
calcium acetate, anhydrous 2 % solution
caustic soda (solid) 3 % solution

Water: de-ionized or distilled

Apparatus: pH meter
magnetic stirrer


Procedure

2 g test substance is weighed into a 250-ml beaker, dissolved in

50 ml de-ionized or distilled water and the solution is
adjusted to pH 8 with caustic soda 3 % while being stirred.

10 ml soda solution 2% is stirred in, the mixture is made up to 150 ml
and adjusted to pH 11 with caustic soda 3%.

Phase 1: Preliminary titration

The amount (ml) of calcium acetate solution which causes permanent turbidity of the test solution is first determined for each product.

Phase 2: Main titration

To confirm the preliminary titration results, further tests are carried out with a series of linearly graduated amounts (ml) of calcium acetate solution, the mid-point of the series being the amount (ml) found from the preliminary titration. –> see example
Increments of 4 ml are suggested.

Important: The weighed amount used for this titration should be enough to consume
20 – 30 ml calcium acetate solution.

Example                     Prelim. titration:           weighed amt.  =  2.0 g            actual consumption  =  60 ml                                     Main titration:  weighed amt.  =  0.8 g            calc.   consumption  =  24 ml   The main titration is hence performed with    :20 ml,   24 ml   and   28 ml.
Important:      As the reaction is time-dependent, the time varying with the product,                                              wait one hour before definitive assessment !
In this case the end-point
In this case the end-point of the titration is at 24 ml calcium acetate solution   Calculation   The amount of calcium that can be inactivated per gram of product and/or the maximum water hardness for which 1 g/l is enough is calculated.   Important : 1ml of the 2 % calcium acetate solution contains 5.067 mg Ca
Maximum amount of Ca that can be inactivated per gram of  product:   mg Ca / g = 5.067 x cons. Ca acetate in ml                                                 weighed amount  
Maximum water hardness for 1 g product:   °dH* / g = 0.7 x cons. Ca acetate in ml                                                 weighed amount

About Engr. Kh. Mashiur Rahman

He is Top Class Digital Marketing Expert in bd based on Google Yahoo Alexa Moz analytics reports. He is open source ERP Implementation Expert for RMG Industry. He is certified IT Professional from Aptech, NCC, New Horizons & Post Graduated from London Metropolitan University (External) in ICT . To Hire his service and Him Email- sales@autogarment.com, Cell# +880 1792525354

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