This study describes an automatic flame atomic absorption system used for the sequential analysis of sodium, potassium, calcium, magnesium, aluminium, iron, zinc and manganese in Pinus Radiata after a nitric acid perchloric acid digestion
The document details a study using an automatic flame atomic absorption system to analyze sodium, potassium, calcium, magnesium, aluminium, iron, zinc, and manganese in Pinus Radiata. The analysis involved digesting plant samples with nitric and perchloric acid followed by sequential measurement using the AA-975 instrument connected to an HP-85 computer and PSC-55 autosampler.
The note provides specific instrumental conditions, including wavelengths, integration times, and gas flow rates for each of the eight elements. It outlines the sample preparation procedure, including oven drying and acid digestion, and presents results in tables showing concentration values and calibration graphics. The document also explains the calculation method for determining the percentage weight of elements in the original sample.
| Elements Analyzed | Na, K, Ca, Mg, Mn, Zn, Fe, Al |
|---|---|
| Integration Time | 3.0 seconds (4.0 for Al) |
| Air Flow Rate | 13.0 L/min |
| Acetylene Flow Rate | 2.30 to 5.00 L/min |
| Nitrous Oxide Flow Rate | 11.0 L/min |
The system was used for the sequential analysis of sodium, potassium, calcium, magnesium, aluminium, iron, zinc and manganese.
The integration time is set to 3.0 seconds for most elements, while 4.0 seconds is used for aluminium.
The air flow rate is set up to 13.0 litres per minute for all elements analyzed.