Maintenance and maintenance of functional components of atomic absorption spectrometer

Maintenance and maintenance of atomic absorption spectrometer accessories

1. Host

1) replace the fuse (behind the instrument)

2) quartz windows on both sides of the clean sample room (flame / Shi Molu)

Gas purging / anhydrous cotton ball / lens paper

2. Flame atomizer

Application of atomic absorption spectrometry

Application scope

Example

Environmental protection and water quality

Trace elements, chromium, copper, silver, and ultra trace copper in water.

Food inspection

Copper, iron, manganese and zinc in sesame seeds, lead in salt, trace tin in cans, zinc and iron in edible L-lysine hydrochloride, iodine in food, trace lead in liquor, potassium, copper and zinc in fungus, lead in tea leaves, and arsenic in soy sauce

Biochemical pharmaceuticals

Lead, arsenic and mercury in cosmetics, zinc in high zinc gastrodia, trace copper in Chinese herbal medicine, trace elements in aloe, lead in Chinese herbal medicine, manganese in medicine, trace germanium in biological samples, 12 elements in ephedrine extract

clinical medicine

Trace cadmium in nails, Trace Manganese in urine, potassium and zinc in hair, trace elements in hair, selenium in serum, chromium, manganese, selenium in serum, and four elements in urine

chemical industry

Four trace elements in high purity barium carbonate, copper in industrial fluosilicic acid, trace copper in coinage plating bath, high content of nickel in catalyst, impurity elements in alumina, trace Cr2O3 in alumina, lead in blended gasoline, indirect determination of zirconium, zinc and lead in lubricating oil, and trace impurity arsenic in high purity nickel

metallurgy

Determination of Antimony in Crude Copper, Trace Elements in Aluminum Alloy, Trace Elements in Steel, Lead Content in Lead-Antimony Alloy, Trace Calcium Oxide in Zinc Concentrate, Zinc-Copper-Iron in Barite, Calcium in Lead-Calcium Alloy, Trace Gold and Arsenic in High Purity Lead

1) clean the burner.

A / 0.1mol/L nitric acid immersion cleaning / deionized rinse once a month.

B, dismantling and cleaning once a year.

2) cleaning nebulizer

A, rinse with water for 10 minutes after each sample.

B, use the wire to gently pass the atomizer.

Once a month

3) clean mixing chamber, water seal and atomization system - once a year.

Remove the burner/atomizer/impact ball from the flame atomizer and remove the connecting pipe and cable.

The mixing chamber, water seal and atomization system (white PTFE) were removed, soaked in dilute nitric acid and washed with cotton swab.

Rinse the mixing chamber, water seal and atomizing system components with deionized water.

Finally, the flame atomization system is installed in the corresponding order.

3. Graphite furnace atomizer

1) cleaning quartz windows.

Scrub quartz windows on both sides of anhydrous alcohol and scrub with lens paper.

Once every three months.

2) clean graphite tube

Using Clean out in software

Cleaning every day

3) cleaning graphite cone and graphite furnace body.

Scrubbing graphite furnace chimney with alcohol cotton ball

Washing graphite furnace electrode with alcohol cotton ball

Scrubbing graphite furnace cavity with alcohol cotton ball

Once a week

4. automatic sampler

1) the maintenance of injection tube.

A, the shear of injection tube.

Cut off the end of the injection tube with a notch angle of about 10-15 degrees.

Cleaning of B and injection tube

First use 8% to 13% sodium hypochlorite, then deionized water.

Once a month

2) wash and rinse the cup.

First wash with alcohol and then dilute nitric acid / deionized water.

Once a month

3) cleaning the mixing cup.

First wash with alcohol and then dilute nitric acid / deionized water.

Once a month

4) cleaning quantitative device.

Add dilute nitric acid to flushing and diluting bottles.

Atomic absorption spectrometer accessories