Suggested Preventive Maintenance Frequencies for Specific Instruments
Effective Date: 11/01
Point of Contact: Quality Engineer for Regulatory Programs
| Instrument | Preventive Maintenance | Frequency |
|---|---|---|
| AA spectrophotometer | Inspect nebulizer. Inspect spectrophotometer quartz windows, burner head, tubing, pump, and O rings. |
Daily. Daily. |
| Furnace AA spectrophotometer | Inspect graphite tube. Replace contact cylinders. Inspect and clean furnace housing. |
Daily. As needed from QC check. Daily; As necessary. |
| Cold vapor and hydride AA spectrophotometer | Inspect tubing. Inspect absorption cell; replace or clean. |
Daily. Daily; As necessary. |
| ICP | Inspect torch, peristaltic pump tubing, and nebulizer. Inspect and clean spray chamber. Clean fan filters. Evaluate profile performance. Check electronics (e.g., white light, dark current). |
Daily. As necessary. Semiannually. Daily. Annually. |
| GC general | Inspect and replace septa. Bake out injector body. Check GC flow rates and adjust as necessary. Inspect columns (change glass sleeve inserts, shorten ends of columns, change glass wool plugs, check for leaks or replace). Perform electron capture detector wipe tests. |
As necessary. Daily. Daily. As needed from QC check. Semiannually. |
| Purge and Trap | Inspect and clean. Clean sparger. Change trap. Bake trap. Check purge flow. Check for leaks. |
Daily; As necessary. As needed. As needed. Daily. Daily. Daily. |
| Mass spectrometer | Replace vacuum pump oil and inspect and change foreline trap material, if necessary. Check ion source and analyzer (dismantle, clean, and replace parts). Check vacuum. Check mass calibration with FC 43 (perfluorotributylamine). Check performance of manufacturer specified tune. |
Semiannually.
As needed. Daily. Daily. |
| High performance liquid chromatography | Check gas and liquid lines for leaks. Clean or replace solvent inlet filters. Check pump seals. Check for injector leaks. Check and clean liquid lines and detector. Check system pressure. Follow troubleshooting guides for off normal pressure. Check and replace pump oil. |
Daily for liquid lines and quarterly or when modified for gas lines. Quarterly. Monthly. Daily, as used. Daily for difficult samples and weekly otherwise. Daily, as used. Check monthly; Replace annually. |
| Total organic compound analyzer | Inspect and clean. | As needed from QC check. |
| Uranium fluorometry | Inspect and clean. | As needed from QC check. |
| Gas proportional counters | Inspect and clean. | As needed from QC check. |
| Alpha energy analysis | Inspect and clean. | As needed from QC check. |
| Gamma energy analyzer | Inspect and clean. | As needed from QC check. |
| Liquid scintillation counter | Inspect and clean. | As needed from QC check. |
| Analytical balance | Calibration and cleaning by PNNL approved metrology organization. | Annually. |
| Ultraviolet/visible spectrophotometer | Inspect and clean. | As needed from QC check. |
AA = Atomic absorption
GC = Gas chromatograph
ICP = Inductively coupled plasma spectrometer