Answer Posted / ravi kumar tummala

yes, we r injecting std injection at low concentrtion,one reason is impurity specification level and another one is to calculate the imp's against std area.

why we are using hexane in calibration of number of drop per mL

1662

---

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

1574

---

could negative ions be produced by bombardment process in mass spectrometry?

1719

---

Why six unit used for precision?

1274

---

in which situation ion pair agent require to use?

675

---

In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

3066

---

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

9179

---

Basic principle of ESI?

2095

---

What is split ratio in Gc? Splitless? how requirr to select?

818

---

How to choose the which salt is suitable for mobilephase

3174

---

if your product is soluble in 0.1n hcl and water then which you choose as media from these 2 media?

630

---

mode of absorption in alimentary canal?

2337

---

what is classification of elemental impurities? what is risk assement in elemental impurities?

705

---

how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

2529

---

what is the structure of DOWEX-50

5451

---