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Atmic Absorption Spectrophotometer SavantAA

Atmic Absorption Spectrophotometer SavantAA

Atmic Absorption Spectrophotometer SavantAA

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Description

Atomic Absorption Spectrophotometer (AAS) SavantAA dari GBC Scientific Equipment adalah instrumen analitis yang dirancang untuk mendeteksi dan mengukur konsentrasi unsur logam tertentu dalam sampel cair dengan akurasi dan presisi tinggi. Model SavantAA dikenal sebagai AAS yang kompak, andal, dan user-friendly, ideal untuk laboratorium kontrol kualitas, industri, pendidikan, dan penelitian rutin.

Instrumen ini beroperasi berdasarkan prinsip penyerapan cahaya oleh atom-atom bebas di keadaan dasar. Sampel yang telah diatomisasi (biasanya dalam nyala api atau tungku grafit) akan menyerap cahaya pada panjang gelombang spesifik yang dipancarkan oleh lampu katoda hollow (HCL) unsur target. Besarnya penyerapan sebanding dengan konsentrasi unsur tersebut dalam sampel.

SavantAA menawarkan kinerja yang solid untuk analisis multi-unsur secara berurutan (sequential) dengan biaya operasional yang kompetitif. Instrumen ini cocok untuk aplikasi dalam bidang lingkungan (analisis air, tanah), industri (logam, semen, keramik), makanan & minuman, farmasi, dan geokimia.

Fitur Utama:

  • Desain Double-Beam Optik: Memberikan stabilitas sinar yang tinggi, mengurangi noise, dan meminimalkan kebutuhan untuk koreksi drift, sehingga menghasilkan baseline yang stabil dan data yang dapat diandalkan.

  • Sistem Pencampuran Nyala (Flame System) yang Aman dan Efisien: Dilengkapi dengan sistem pengaman gas (pressure/interlock) dan burner kepala lebar untuk sensitivitas optimal.

  • Koreksi Latar Belakang Deuterium (D₂): Mengkompensasi gangguan spektral akibat penyerapan molekular atau hamburan partikel, sehingga memperluas rentang linier dan akurasi.

  • Kontrol Instrument Berbasis PC: Dioperasikan melalui perangkat lunak GBC yang intuitif di komputer, memudahkan pengontrolan instrumen, akuisisi data, pengolahan, dan pelaporan.

  • Kompatibel dengan Tungku Grafit (Graphite Furnace): Dapat dikonfigurasi dengan sistem GTA (Graphite Tube Atomizer) GBC untuk meningkatkan sensitivitas analisis hingga level parts-per-billion (ppb), cocok untuk sampel dengan konsentrasi sangat rendah.

  • Auto-Sampler (Opsional): Mendukung otomatisasi untuk peningkatan throughput dan reprodusibilitas.

Spesifikasi Teknis Umum:

1. Sistem Optik & Spektrometer:

  • Tipe: Double-beam (untuk lampu) / Single-beam (untuk korektor latar belakang D₂).

  • Monokromator: Czerny-Turner.

  • Panjang Fokus: 300 mm (umum untuk model ini).

  • Kisi Difraksi: 1800 garis/mm.

  • Rentang Panjang Gelombang: 185 – 900 nm.

  • Lebar Celah: Dipilih secara otomatis melalui perangkat lunak (biasanya 0.2, 0.5, dan 1.0 nm).

2. Sumber Radiasi:

  • Lampu: Lampu Katoda Hollow (HCL) untuk berbagai unsur, dengan dudukan minimal 2 lampu (diputar secara otomatis). Lampu Katoda Hollow untuk unsur-unsur khusus juga didukung.

  • Korektor Latar Belakang: Lampu Deuterium (D₂) dengan arus yang distabilkan secara pulsa.

3. Sistem Atomisasi:

  • A. Nyala Api (Flame):

    • Burner: Head burner lebar (10 cm) berlubang titanium untuk keseragaman nyala dan ketahanan korosi.

    • Nebulizer: Aliran tinggi dengan pengaturan dapat dioptimalkan.

    • Sistem Drainase: Dilengkapi perangkap uap air (mist trap) dan pengaman.

    • Gas yang Didukung: Udara-Asetilen dan Nitrous Oksida-Asetilen.

  • B. Tungku Grafit (Opsional – GTA):

    • Tipe: Graphite Furnace dengan kontrol suhu yang diprogram secara digital.

    • Pendinginan: Sistem pendingin air internal atau eksternal.

    • Gas Pelindung: Argon.

4. Detektor:

  • Tipe: Photomultiplier Tube (PMT) dengan rentang spektral yang luas.

5. Kontrol & Perangkat Lunak:

  • Antarmuka: Kontrol penuh melalui PC dengan koneksi RS-232 atau USB.

  • Perangkat Lunak: GBC Avanta atau Solaar Series Software (tergantung tahun produksi) untuk kontrol instrumen, kalibrasi (kurva kalibrasi, metode adisi standar), akuisisi data, dan pelaporan yang komprehensif.

6. Kinerja:

  • Akurasi: Biasanya < 0.5% RSD untuk pengukuran berulang (tergantung unsur dan matriks).

  • Deteksi Limit (Flame): Umumnya pada level parts-per-million (ppm) hingga sub-ppm, bervariasi per unsur (mis: Cu ~0.01 ppm, Pb ~0.1 ppm).

  • Deteksi Limit (Furnace): Umumnya pada level parts-per-billion (ppb), bervariasi per unsur (mis: Cd ~0.1 ppb, Pb ~1 ppb).

7. Persyaratan Utilitas:

  • Gas: Asetilen (kemurnian tinggi), Udara/Nitrous Oksida, Argon (untuk tungku).

  • Listrik: 220-240V / 50-60Hz.

  • Pipa Pembuangan: Untuk drainase cairan dari chamber nyala api.

  • Ventilasi: Ruang instrumen harus memiliki sistem exhaust/fume hood yang memadai.

8. Dimensi & Berat (Perkiraan):

  • Unit Spektrometer: Lebar ~120 cm, Tinggi ~50 cm, Kedalaman ~60 cm. Berat ~80 kg.

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