Answer Posted / prabhakar

In kf method we can detect only water % present in the drug bt in lod we can detect the water and as well as solvent present in the sample.sothier is different when we done lod and kf of sample of one material.

which situation gc hs and gc als require to use?

721

---

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

1546

---

Qc interview questions

1694

---

can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

2127

---

In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

1909

---

How to know the estimated LOQ concentration in ppm

1153

---

how you establish the LOQ?

720

---

What is the use of tlc and hplc? And when and where use?

1100

---

on the basis of bcs class how to proceed the solubility?

699

---

for inorganic molecules require to do RS, Assay and disso?

668

---

what is diffrence between specificity and selecivity?

715

---

What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

1850

---

What is control room temperature and which guide line says?

1580

---

Difference between hlaf and rlaf

2056

---

in hplc chromatogram started from left to right and in uv spectrum started from left to right

889

---