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

0 Answers   Perkin Elmer,

---

How to make up 100ml of a solution cintaining compound A at 95µg/ml and compound B at30µg/ml for an HPLC reference standard.

3 Answers  

---

why peak purity not considered in GC?

4 Answers   DRL, Reddy Labs, Vimta Labs,

---

why xterra column require to use at higher ph?

0 Answers  

---

what is difference between assay&purity&potency?

5 Answers  

---

---

Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

2 Answers   Apotex,

---

how to calculate the Step and ripple accuracy for pump gradient test for UPLC?

1 Answers   Wockhardt,

---

In case of dissolution test, if there is variation within 6 individual units however the batch is complying as per S1 criteria, is it necessary to do investigation for the same? What should be the criteria for such variation?

2 Answers  

---

If compound Pka is 5 then which buffer you will select ?

5 Answers   Avra, GVK,

---

how to develop the icp ms method? Application of icp ms?

0 Answers  

---

What is FFA, PV, and PAV value in oil.

1 Answers   Nestle,

---

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

0 Answers  

---