Answer / dr. a. bera, cdl

When not in use, the glass probe tip must be kept wet at all times to avoid the pH sensing membrane dehydration and the subsequent dysfunction of the electrode.
A glass electrode alone (i.e., without combined reference electrode) is typically stored immersed in an acidic solution of around pH 3.0. In an emergency, acidified tap water can be used, but distilled or deionised water must never be used for longer-term probe storage as the relatively ionless water "sucks" ions out of the probe membrane through diffusion, which degrades it.
Combined electrodes (glass membrane + reference electrode) are better stored immersed in the bridge electrolyte (often KCl 3 M) to avoid the diffusion of the electrolyte (KCl) out of the liquid junction.

Why Deuterium lamp is used as UV light Source for UV.

4 Answers  

---

(0.41)d what is d?

1 Answers   Gland Pharma,

---

How we can determine water content in piperazine

1 Answers   Cipla, GVK,

---

Polarized meter calibration, 1. Method name? 2. Which solution use? 3.why?

1 Answers  

---

how we do assay of urea, ammonium sulpate, ammonium nitro pospate etc

1 Answers   Alembic,

---

---

Why KBr pellet is used in IR?

11 Answers   Glochem,

---

How to determine water content of bis tetrazole amine mono ammonium salt

0 Answers  

---

why we are calibrating autopolarimeter with quartz control plates

1 Answers  

---

When we calculate Impurity against impurity std.solution and when we calculate impurity against diluted standard with applying RRF?

2 Answers   Torrent Pharma,

---

why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?

6 Answers  

---

What is Threshold in hplc?

2 Answers   Hetero,

---

What is the difference between spectro meter and spectro photo meter?

1 Answers   APM, Graviti Pharmaceuticals, Ranbaxy,

---