Firma:              Hitachi

Modell:            Z 9000

Kommentar:   Dokumente engl.

External View of Instrument

The instrument (Model Z-9000 Simultaneous Multielement Atomic Absorption Spectrophotometer) incorporates a spectrophotometric unit, controller, display, operating unit, graphic plotter, gas controller, atomizing unit, G. A. power supply and auto sampler.

Fig. 2-1 shows names of each part.

On the rear and sides of the instrument, there are no switches, connectors, knobs, etc. which must be operated.

Specifications

Spectrophotometric unit

1) Measuring method:             4-wavelength double-beam measurement

2) Wavelength range:              190 to 890 nm

3) Wavelength adjustment:     Automatic spectrum peak adjustment

4) Diffraction grating:               1800 lines/mm, blazed at 200 nm; 4 pcs

5) Focal distance:                   400 mm

6) Dispersive power:               1.3 nm/mm

7) Monochromatic width:         0.8 nm

8) Optical detector:                 R456 (automatic 100 adjustment)

Light source

1) Number of lamps:               8

2) Lighting current:                  5 to 20 mA

                                               (average, set automatically)

3) Brightness modulation:       1200/1800 Hz

                                               (DC bias stabilization)

4) Lamp changeover:              1 set of 4 lamps changed automatically

Signal processing unit

1) Background correction:      Available for all wavelengths

2) Display signal:                     Peak height, peak area, peak width, sample signal and      reference signal can be displayed

3) Calibration curve:                Least squares method; linear, quadratic and cubic functions         (selected automatically)

4) Accuracy improving method:         Abnormal value delete, recalibration curve creation,            average value, standard deviation, relative standard deviation         display

Display unit                            12 inch monochromatic CRT

Display on CRT

1) Analyzed element select display

2) Lamp energy display

3) G. A. temperature program display

4) Auto sampler program display

5) Standard sample input display

6) Calibration curve display

7) Analyzed result display

8) Atomized signal display

9) Analyzing beam profile display

10) Element analyzing parameter list

11) Test mode display

12) Date and time display (clock incorporated)

13) Graphite cuvette operation count display

14) G. A. temperature program progress display

15) Error display

Analyzing parameter store function

1) Sample analyzing and read, automatic parameter setting (20 types maximum)

2) Store of analyzed result (for 400 analyses)

Auto sampler function

1) Pipetting quantity:                10, 20, 30, 40 µL in 4 steps

2) Turntable:                            Cups arranged in 3 rows concentrically

3) Number of sample cups:    9 standard samples

                                               36 analyzed samples (72 without dilution)

                                               36 diluted samples

                                               1 reagent

                                               Volume 1.5 mL each

4) Diluent:                                Volume 1 L

5) Waste liquid receptacle:     Capacity 1 L

Pre-treatment function

1) Diluting function:                 Diluting factor 1/100 (adjustable)

2) Concentrating function:       Injection and drying of 25 cycles maximum

3) Reagent adding function:    Added volume 10 µL

Measuring mode

1) Working curve method

2) Standard addition method

3) Simplified standard addition method

(Any of them can be combined with reagent adding method.)

Graphite atomizer

1) Heating method:                  Optical temperature control method, current control method         selectable

2) Maximum current:               400 A AC, 12.5 V

3) Temperature program:       Drying, ashing, atomizing, cleaning 10 steps settable

4) Argon:                                  Sheath gas, 3 L/min

                                               Carrier gas 0 to 0.3 L/min

                                               Atomizing flow decreasing function selectable

5) Cooling water:                     2 L/min

6) Permanent magnet:            Magnetic field 1 ± 0.05 T

7) Safety function:                   Overcurrent prevention

                                               Gas pressure monitor

                                               Cooling water pressure monitor

                                               Heating prevention

8) Cuvette:                               Tube cuvette

Communicating function

RS-232C, bilateral communication (interface must be optionally connected)

Printer

1) Recorder:                            Heat-sensitive graphic printer

2) Recording chart:                 Effective width 170 mm

Overall

1) Dimensions:                        1000 wide X 650 deep X 1300 high mm

2) Weight:                                300 kg with casters

3) Power consumption:           200 V AC, 28 A, 50/60 Hz for atomizing

                                               200 V AC, 3 A, 50/60 Hz for non-atomizing