| Method | Operating parameters | Matrix | Element | LoD (ppm) | Year | Ref No. |
| LIBS | Q-switched Nd:YAG, 1,064 nm, 8 ns, 200 mj, 20 Hz | Steel | C | 65 | 1992 | [110] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Low alloy steel | C | 7 | 2000 | [111] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Liquid steel | C | 5 | 2003 | [112] | LIBS | Q-switched Nd:YAG, 532 nm, 6 ns, 160 mj, 10 Hz | Steel | C | 5 | 2001 | [113] | DP VUV LIBS | Q-switched Nd:YAG, 1,064 nm, 15 ns, 200 mj | Steel | C | 2.9 (N2) | 2014 | [90] | LIBS-LIRF | Q-switched Nd:YAG, 532 nm, 6 ns, 2 mj, 10 Hz | Steel | C | 130 (N2), 390 (air) | 2017 | [114] | LIBS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 200 mj, 20 Hz | Steel | S | 70 | 1995 | [115] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Low alloy steel | S | 8 | 2000 | [111] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Liquid steel | S | 11 | 2003 | [112] | LIBS | Q-switched Nd:YAG, 532 nm, 6 ns, 160 mj, 10 Hz | Steel | S | 4.5 | 2001 | [113] | DP VUV LIBS | Q-switched Nd:YAG, 1,064 nm, 15 ns, 200 mj | Steel | S | 1.5 (N2) | 2014 | [90] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Low alloy steel | P | 9 | 2000 | [111] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Liquid steel | P | 21 | 2003 | [112] | LIBS | Q-switched Nd:YAG, 532 nm, 6 ns, 160 mj, 10 Hz | Steel | P | 6 | 2001 | [113] | LIBS-LIF | Q-switched Nd:YAG, 532 nm, 6 ns, 10 Hz | Steel | P | 0.7 | 2009 | [99] | LIBS | Q-switched Nd:YAG, 532 nm, 6 ns, 160mj, 10 Hz | Steel | N | 15–25 | 2001 | [113] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Liquid steel | Cr | 9 | 2003 | [112] | DP LIBS + PLS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 10 Hz | Molten steel | Cr | 649 | 2015 | [106] | Multiple-laser pulse | Q-switched Nd:YAG, 1,064 nm | Liquid steel | Ni | 9 | 2003 | [112] | DP LIBS + PLS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 10 Hz | Molten steel | Ni | 430 | 2015 | [106] | LIBS + ring magnet confinement | Q-switched Nd:YAG, 532 nm, 5 ns, 60 mj. | Steel | V | 11 | 2014 | [98] | DP LIBS + PLS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 10 Hz | Molten steel | V | 88 | 2015 | [106] | LIBS + ring magnet | Q-switched Nd:YAG, 532 nm, 5 ns, 60 mj. | Steel | Mn | 30 | 2014 | [98] | DP LIBS + PLS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 10 Hz | Molten steel | Mn | 134 | 2015 | [106] | DP LIBS + PLS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 10 Hz | Molten steel | Si | 107 | 2015 | [106] | LIBS-LIF | Q-switched Nd:YAG, 532 nm, 6 ns, 50 mj, 10 Hz | Low alloy steel | Co | 0.82 | 2016 | [101] | LIBS-LIF | Q-switched Nd:YAG, 532 nm, 8 ns, 60 mj, 10 Hz | Steel | B | 0.5 | 2016 | [100] | RELIBS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 5 Hz | Aluminum alloy | Mg | 21 | 2010 | [44] | RLIBS | OPO laser, 210 nm–2.2 μm, 20–200 μj, 5 ns, 10 Hz | Aluminum alloy | Mg | 0.75 | 2013 | [45] | DP-LIBS | Q-switched Nd:YAG, 1,064 nm, 30 mj, 12–13 ns, 1 Hz | Aluminum alloy | Cr | 10 | 2006 | [93] | DP-LIBS | Q-switched Nd:YAG, 1,064 nm, 60 mj, 8 ns, 10 Hz | Aluminum alloy | Sr | 0.56 | 2018 | [94] | RELIBS | Q-switched Nd:YAG, 1,064 nm, 7 ns, 5 Hz | Aluminum alloy | Si | 1438 | 2010 | [44] | RLIBS | OPO laser, 210 nm–2.2 μm, 20–200 μj, 5 ns, 10 Hz | Aluminum alloy | Si | 80 | 2013 | [45] | DP-LIBS | Q-switched Nd:YAG, 1,064 nm, 5 ns | Aluminum alloy | Li | 3.2 | 2019 | [95] | CF-LIBS | Q-switched Nd:YAG, 1,064 nm, 80–120 mj, 5 ns, 10 Hz | Gold alloy | Ag | 4.3 | 2018 | [116] | CF-LIBS | Q-switched Nd:YAG, 1,064 nm, 80–120 mj, 5 ns, 10 Hz | Gold alloy | Au | 0.05 | 2018 | [116] | LIBS-LIF | Q-switched Nd:YAG, 532 nm, 8 ns, 60 mj, 10 Hz | Nickel-based superalloy | B | 0.9 | 2016 | [100] |
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