How to decide the standard concentration for related substances hplc method

1 Answers  

---

How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that?

1 Answers  

---

how much mass should be there in volumetric flask while in preparation of sample for assay? 

0 Answers   Reddy Labs,

---

In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

0 Answers   Laurus,

---

HOw do i calculate the number of theoretical plate on a HPLC chromatography

2 Answers   Laurus,

---

---

what is turbidimetric titration?Give 2 examples.

0 Answers   Laurus,

---

what is difirence b/w ROI&ROE

1 Answers   Pfizer,

---

Difference between c18

6 Answers   Apothecon, Dr Reddys, Intas, IPQA, SUN, Torrent Pharma,

---

on what basis SOP's can be changed? IF mobile phase ratio is 70:30 to how much % can we change the ratio in HPLC process

7 Answers   Cipla, Ranbaxy,

---

why reference flow required during hplc analysis on rid?

1 Answers  

---

How to choose the which salt is suitable for mobilephase

0 Answers   Cipla, Ranbaxy,

---

calibrtion procedue of LC-MS

0 Answers   GVK, Matrix,

---