What is primary & Secondary Standard ? Give Example
Answer Posted / ananth
Primary standard :
Primary standards are the materials having high purity
values under specified conditions which can be used to
standardise the volumetric solutions.This primary stadards
also used to prepare the solutions which are necessay for
the calibration of analytical instruments.
Secondary standards:
Generally volumetric solutions are
known as secondary standards
| Is This Answer Correct ? | 262 Yes | 87 No |
Post New Answer View All Answers
Why sodium hydroxide used for maintain pH of phosphate buffer
how much mass should be there in volumetric flask while in preparation of sample for assay?
why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?
2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.
why we are using benzene, anyline in acetic anhdride assay titration method?
What is the purpose of octyl silane columns?
why does used dry caffien in HPLC calibration?
how to decide for one product require water content or LOD?
[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?
WHY pKa value is more important than pH value of the mobile phase in HPLC?
1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer
what is partion and column chromatography
what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.
Is it nessesary all multimedia dissolution require descriminatory?
why we use a particular hplc column for a particular compound give reasons?please