Answer Posted / b srinivasu

Kbr and sodium chloride cells are alkyl halides so its donot react and do not exhibit any absorbance spectrum

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?

1912

---

in dissolution if one bowl got 70 percent 2nd bowl got 80 percent and 3rd bowl got 90 percent then how proceed?

718

---

which are the sizes of capsules?

894

---

what is definition of validation? which components are followed give detail?

2294

---

How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

687

---

in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?

667

---

Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

1860

---

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

9184

---

How to choose the which salt is suitable for mobilephase

3178

---

What is mean by PDR?

863

---

why salisylic acid not using now days for disdolution calibration?

716

---

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

891

---

what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1924

---

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

1976

---

CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

1152

---