Answer / sunil tiwari

RS stands for related substance, means by-products upon
completion of reaction, or the unreacted portion present in
the product. RS testing help us to identify the adequate
quantitiy of these by-products or unreacted part.
More over RS help us during the stability study to know any
significant change in the nature of product during long
storage in various climatic conditions

Answer / kalyan

rs test is the related substance test which are performing
to known the impurities along with main substance.

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 Answers  

---

Why 1800 ml of dissolution media used In Carbamazepine ER USP Tablets But other drug only 900 ml Media Used ?

1 Answers   Torrent Pharma,

---

what is the purpose of Buffer in any titration?Ex:In determination of hardness of water we use ammonia ammoniachloride buffer in titration with EDTA.Why?

13 Answers   Amity, Prakriti, Sr Comunications,

---

what is mean by dissolution hydrodynamics?

0 Answers  

---

can some other acids like nitric acid or HCl can be used in the calibration of UV.Vis. spectrophotometer????

2 Answers   Cipla,

---

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

0 Answers  

---

How much is the standard area for glc analysis

0 Answers  

---

What is impurities in pharma analysis?

1 Answers  

---

If we are getting split peak in Chromatogram,what we can do?

7 Answers  

---

what is poarimeter, why it is used in pharma,and explain briefly about polarimeter?

3 Answers   GVK,

---

How can we separate Urea & semicarbazide in single HPLC method ?

2 Answers  

---

What are usp limits for total impurities,unknown impurity

1 Answers   Dr Reddys,

---