| 摘要 |
PURPOSE:To reduce analysis time significantly, by turning a changeover valve to a sample discharge position when a sample is to be changed and the flow rate of a gas supplied into a chamber is increased. CONSTITUTION:When one sample is to be analyzed, a control signal is provided from a controller 34 to supply power to an induction coil 10 through a matching box 12 from a high frequency power source 14 and a cooling gas and a plasma gas are supplied to a plasma torch 2 to maintain a plasma. Consequently, a sample 16 sucked up by a pump 18 is atomized into a chamber 24 and introduced into the torch 2 through a changeover valve 4 to cause light emission. Then, when different samples are to be analyzed, a signal is provided to a motor 30 from a controller 32 to turn the valve 4 to the sample discharge position and the flow rate of a carrier gas supplied to the chamber 24 is increased by a controller 28 to match the timing thereof.
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