---
kind: "section"
citation: "42 C.F.R. § 493.1267"
title: "42"
number: "493.1267"
heading: "Standard: Routine chemistry."
url: "https://uscodex.org/cfr/42/493.1267"
---

# §493.1267. Standard: Routine chemistry.


For blood gas analyses, the laboratory must perform the following:

- (a) Calibrate or verify calibration according to the manufacturer's specifications and with at least the frequency recommended by the manufacturer.
- (b) Test one sample of control material each 8 hours of testing using a combination of control materials that include both low and high values on each day of testing.
- (c) Test one sample of control material each time specimens are tested unless automated instrumentation internally verifies calibration at least every 30 minutes.
- (d) **Document all control procedures performed, as specified in this section.**

## Notes

### Source

Source: 68 FR 3703, Jan. 24, 2003, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 263a, 1302, 1395x(e), 1395x(s)(3) and (s)(17).

### Source

Source: 55 FR 9576, Mar. 14, 1990, unless otherwise noted.