What is the Deference between Bulk density & Tap density ?

Answers were Sorted based on User's Feedback



What is the Deference between Bulk density & Tap density ? ..

Answer / me_prashant

Untapped Density = bulk density
Bulk density is the simply fill capacity of any vessels.

we take a 100ml cylinder and fill it with any
substance(Approx-x gram) and read the volume of cylinder.
then the bulk density= weight of substance/ml of cylinder.
unit = gm/ml or gm/cc
but the tapped density is that density which measure after
tapping according to monograph (USP-1, USP-2)we use it when
ever the volume of substance not to be constant.

(for USP- 1 it should be 350 stocks. and for USP -2 it
should be 250 stocks.which we use in calibration of Tap
density tester.)

Is This Answer Correct ?    28 Yes 1 No

What is the Deference between Bulk density & Tap density ? ..

Answer / spln

Bulk Density (0 taps or Untapped): As is volume in
g/ml.This is called as apparent volume.

Tapped Density: after tapping only we can measure the qty
as g/ml. As per USP two types of methods is there, Method-
I&II.
Based on the powder nature tapping are fixed.500 taps, 750
taps & 1250 taps.(Varience% is NMT 2%)
Naturally all powder grades are fixed in 1250 taps.

After 1250taps also varience is more, then go to USP-II
method or any customer requirement is there then we can use
Method-II.

Is This Answer Correct ?    18 Yes 2 No

Post New Answer

More Analytical Chemistry Interview Questions

IN pH CALIBRATION,CALIBRATION IS DONE FOR pH METER OR ELECTRODE?HOW WILL YOU JUDGE THAT THE METER TO BE CALIBRATED WITH 4,7,9.2 BUFFERS?EXPLAIN TEMPERATURE EFFECTS ON pH.

1 Answers   Aurobindo,


How decided 10 ppm standard solution in Swab, rinse method.?

2 Answers  


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

0 Answers   Pfizer,


how to prepare 25 ppm acetone. explian with formula

4 Answers  


why do u get different drug release while doing calibration of dissolution test appratus 1& 2(paddle & basket)?

1 Answers   HDFC, Medrich, Twilight Litaka Pharma,






In dissolution test s1 stage we are getting one bowl 40 % out of 6 bowls what is the root cause you find and how proceed next step? ( Q is 80%)

3 Answers   Reddy Labs,


what is the criteria for choosing capillary column in GC??is it dependent on sample load?

3 Answers  


what are the ideal conditions for coloumn storage

3 Answers   Claris Lifesciences, Srikem Laboratories,


Why we are using a Kf Factor range 4 to 6

7 Answers  


what is full form of RVT

1 Answers  


How to prepare 50 ppm ammonia solution form 25% ammonia solution?

8 Answers   Cadila, IIT,


in hplc calibration injector linearity pass,it means inj and det is good. why to perform detector linearity is it required, if it is required,what is difference between injector and detector linearity in hplc calibration

4 Answers   Dr Reddys, Hetero,


Categories
  • Organic Chemistry Interview Questions Organic Chemistry (342)
  • Inorganic Chemistry Interview Questions Inorganic Chemistry (123)
  • Analytical Chemistry Interview Questions Analytical Chemistry (1387)
  • Physical Chemistry Interview Questions Physical Chemistry (62)
  • General Chemistry Interview Questions General Chemistry (478)
  • Chemistry AllOther Interview Questions Chemistry AllOther (190)