why in hplc peaks are in positive side(it means upside) not in negative side?

3 Answers  

---

In the method validation proceedure,lod & loq calculation we use the formulae for LOD=3.3*SD/slope and for LOQ=10*SD/slope,why we use 3.3 & 10 in the formulae?

1 Answers  

---

acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid

3 Answers   AVT, Hetero,

---

why we use x terra columns at higher ph ?

2 Answers   Hetero,

---

What is the deference between Residual solvents and OVI

1 Answers   RA Chem Pharma,

---

which situation gc hs and gc als require to use?

0 Answers  

---

How will decide to use HPLC OR GC for developing method for unkown compund

5 Answers  

---

Why sodium hydroxide used for maintain pH of phosphate buffer

0 Answers   Medicamen Biotech,

---

Wt s the use of linearity in HPLC method validation

4 Answers  

---

how can we determine RRF value in HPLC FOR CALCULATION OF IMPURITY ?

4 Answers   Macleods,

---

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

2 Answers  

---

Weight balance variation limit during analysis

7 Answers   Amneal Pharmaceuticals,

---