AP1500 FLAME PHOTOMETER
I. Working Principles
According to the molecular structure theory, outer electrons of atoms always move via a trapped orbit, which they usually move out of and transit to the orbit of the excited level, if they receive the heat energy provided by a flame. At the same time, attracted by the nucleus and recovering from the excited level to the normal level, the electrons release energy which can be illustrated by the spectra that release specific wavelengths. This method, which measures the luminescence levels of the elements to be determined at specific wavelengths through qualitative and quantitative analyses, is called analysis of spectra based on flame emission, and the instrument which applies to this method is called a flame photometer.
Theoretically, the contents of the elements to be determined are proportional to the intensity of the spectra released; however, the flame photometer normally applies only to the quantitative analysis of some alkali metals and alkaline earth metals at a certain concentration range, as limited by the excitement energy.
II. Applications
1. Analysis and measurement of cement, glass, ceramics and heat-resisting materials.
2. Measurement of the agricultural land survey and total nitrogen contents of soil.
3. Product analysis and monitoring in pharmaceutical industry and food industry
4. Content analysis of potassium and sodium in serum and urine in clinical treatment.
III. Main Technical Specifications
1. Receiving elements: silicon photocells
2. Spectrophotometry method: interference colored filters
3. Displaying method: liquid crystal displayed readings
4. Stability: Users keep sampling with standard solutions. The maximum relative variation displayed in the instrument is not greater than 3 in 15s, with 1 measurement every minute, and the total measurement is 6. All the variations displayed in the instrument should be not greater than 15
5. Repeatability: ≤3
6. Linear Error: K: ≤0.005mmolL
Na: ≤mmolL
7. Response time:<8s
8. Suction jet of samples:<6mLmin
9. Measuring Range:
Na: 0 - 100ppm; K: 0 - 100ppm; Li: 0 - 100ppm; Ca: 0-1000ppm;
Ba: 0 - 3000ppm;
1) Measuring Limit:
Na: 0.01ppm; K: 0.01ppm; Li: 0.025ppm; Ca: 0.1ppm;
Ba: 10ppm;
2) Constructional features:
a) Able to detect 5 filters with Na, K, Li, Ca, Ba, 5 channels; displays 3 elements and their contents;
b) a touch panel with a digital keyboard;
c) single point corrections -- the correction curve can be saved on the instrument;
d) Interface RS232, through which computers and printers can be connected;
e) a mist separator;