Answer / balaji nagarajan

void volume is the volume of mobile phase within the column
packing & dead vol. is vol. of mobile phase from injector
to detector except vol. in column.

Answer / sss

Void volume-It is the volume of mobile phase which required to saturate the column.

Dead Volume- It is the volume of mobile phase trom point of injection to the elution of first unretained peak.

Answer / ssk

unreten volume of column is dead volume.
void volume OR dead vol. OR delayed volume are same thing.

Why sulfuric acid is used in sulphated ash / residue on ignition test.

9 Answers   CS Pharmaceuticals, Dr Reddys, GVK, HPLC, Micro Labs, Samrudh, Watson Pharmaceuticals, Wings Customer Care,

---

What is difference between" LOD" AND "VACCUME LOD"

2 Answers  

---

what is the use of tap density apparatus? why we calculate it? what is the difference between the bulk density and tap density?

1 Answers   Alchemist, Alembic, Apex,

---

Give me details about dissolution , with name ?

1 Answers   EPCA,

---

why we do the calibration of limit of stry light in hplc & uv

1 Answers   Cipla,

---

What are the class-1 residual solvents listed in ICH guidelines?

2 Answers  

---

if you have given a blank water how you analyse by general analytical techniques?

0 Answers  

---

What should be the precision for HPLC during technology transfer?

3 Answers  

---

why we are using polystyrene film for calibration of I.R spectroscopy?

12 Answers   Abbott, Andhra Organics, Intas, Kemwel, Reddy Labs, RRR, Veritas, Zydus Cadila,

---

why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

0 Answers  

---

we run the same sample in same method in different flow rates in HPLC,any changes in sample analysis?

2 Answers  

---

What is pooled sample in Dissolution

2 Answers   Graviti Pharmaceuticals, Lupin,

---