The correct statements for hollow cathode lamp (HCL) from the following are:
\[ \begin{array}{l} \text{(A) HCL is suitable for atomic absorption spectroscopy (AAS)} \\ \text{(B) lines emitted from HCL are very narrow} \\ \text{(C) the hardening of lamp makes it unsuitable for AAS} \\ \text{(D) transition elements used in lamps have short life} \end{array} \]
(a)A, B and C
(b)B, C and D
(c)C, D and A
(d)D, A and B
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
The HCL is the standard AAS source and emits very narrow lines. Hardening (gas clean-up) degrades a lamp. Chapter key (a).