HKL-7196A UV-Vis for Determination of Hexavalent Chromium in Domestic Waste
Overview
HKL-7196A UV-Vis for Determination of Hexavalent Chromium in Domestic Waste conforms to the EPA Method 7196A Chromium, hexavalent (ColorImetric). It is used to determine the concentration of dissolved hexavalent chromium [Cr(VI)] in EP/TCLP characteristic extracts and ground waters. This method may also be applicable to certain domestic and industrial wastes, provided that no interfering substances are present.
Dissolved hexavalent chromium, in the absence of interfering amounts of substances such as molybdenum, vanadium, and mercury, may be determined colorimetrically by reaction with diphenylcarbazide in acid solution. A red-violet color of unknown composition is produced. The reaction is very sensitive, the absorbancy index per gram atom of chromium being about 40,000 at 540 nm. Addition of an excess of diphenylcarbazide yields the red-violet product, and its absorbance is measured photometrically at 540 nm.
Features
Wide Wavelength Range: Meets the requirements of various fields for wavelength coverage.
Six spectral bandwidth options (4nm, 2nm, 1nm, 0.5nm, 0.2nm, 0.1nm) meet diverse users’stringent requirements.
Fully Automated Design: Achieves the simplest measurement method.
Large-scale integrated circuit design greatly enhances system scalability and reliability.
High-Performance Optical Design: Utilizes imported light sources and receivers to ensure high performance and reliability.
Rich Measurement Methods: Features various measurement modes such as wavelength scanning, time scanning, multi-wavelength determination, multi-order derivative determination (optional), dual-wavelength, triple-wavelength (optional), and DNA/protein measurement (optional), meeting diverse needs. Results can be displayed directly on a 6-inch large screen.
Flexible Accessory Options: Optional accessories include single-cell holder, manual four-cell holder, manual eight-cell holder, automatic eight-cell holder, glass holder, test tube stand, and cuvettes of different specifications (1cm, 5cm, and 10cm).
Measurement data can be output via a printer and is equipped with a USB interface.
Measurement parameters and data can be saved even after power-off for user convenience.
More precise and flexible measurement requirements, such as spectral scanning, can be achieved through PC software.
Technical Parameters
Wavelength Range: 190–900 nm
Spectral Bandwidth: 0.1/0.2/0.5/1.0/2.0/4.0 nm
Wavelength Accuracy: ±0.3 nm
Wavelength Reproducibility: ≤0.1 nm
Transmittance Accuracy: ±0.3% τ (0–100% τ), ±0.002 A (0–0.5 A), ±0.003 A (0.5–1 A)
Transmittance Reproducibility: ±0.1% τ (0–100% τ), ±0.001 A (0–0.5 A), ±0.0015 A (0.5–1 A)
Stray Light: ≤0.008% τ (220 nm NaI, 340 nm NaNO₂)
Stability: 0.0005 A/h (after warm-up at 500 nm)
Photometric Modes: Transmittance, Absorbance, Concentration, Energy
Wavelength Adjustment: Automatic
Photometric Range: -4–4 A
Display: 6-inch high-brightness LCD screen
Detector: Photomultiplier Tube (PMT)
Light Sources: Imported tungsten lamp, imported deuterium lamp
Power Supply: AC 220 V/50 Hz or 110 V/60 Hz
Power Consumption: 120 W
Dimensions: 560 × 450 × 230 mm
Net Weight: 28 kg
FAQ
Q1: Which standard does this product (HKL-7196A UV-Vis for Determination of Hexavalent Chromium in Domestic Waste) comply with?
A: HKL-7196A UV-Vis for Determination of Hexavalent Chromium in Domestic Waste conforms to the EPA Method 7196A Chromium, hexavalent (ColorImetric). Dissolved hexavalent chromium, in the absence of interfering amounts of substances such as molybdenum, vanadium, and mercury, may be determined colorimetrically by reaction with diphenylcarbazide in acid solution. A red-violet color of unknown composition is produced. The reaction is very sensitive, the absorbancy index per gram atom of chromium being about 40,000 at 540 nm. Addition of an excess of diphenylcarbazide yields the red-violet product, and its absorbance is measured photometrically at 540 nm.
Q2: What is the applicable scope of HKL-7196A UV-Vis for Determination of Hexavalent Chromium in Domestic Waste?
A: It is used to determine the concentration of dissolved hexavalent chromium [Cr(VI)] in EP/TCLP characteristic extracts and ground waters. This method may also be applicable to certain domestic and industrial wastes, provided that no interfering substances are present.
Q3: Do you provide online training services?
A: If assistance is needed, we will provide you with online installation and commissioning services, as well as comprehensive operational training. Additionally, we offer year-round, 24/7 online training support for end users.
Q4: What is your minimum order quantity and how long is your usual delivery lead time?
A: The MOQ is one unit. The estimated time for delivery is about 20 days after receiving the advance payment.
Q5: What international shipping methods do you support?
A: We offer a variety of flexible international shipping options to meet your needs: (1)International Express: Collaborating with globally leading courier companies such as DHL, FedEx, UPS, and TNT, suitable for small batches and high-value goods. (2)Air Freight: Ideal for medium-sized shipments, offering good cost-effectiveness. (3)Sea Freight: This type of transport is best for big orders, and it can offer you Full Container Load (FCL) and Less than Container Load (LCL) depending on the size of your consignment. The journey will usually take 20–40 days, though the exact timing depends on the destination port of course (4)Rail Freight: Clients located in the Eurasian continent (such as Central Asia, Russia, Europe) are the main focus of this offer, which includes regular and reliable China-Europe Railway Express services.
About us
Hong Kong Laboratory Technology Limited has built a solid reputation in the instrumentation field as a dependable partner since 2018. Over the past eight years, we have established a powerful network and helped 500+ customers by solely representing 50+ internationally famous brands. Using our deep insight into the market, we provide a complete supply chain solution that begins with Research and Development and ends with the production, all underpinned by a rigorous quality management system. We ensure our main instruments are developed based on the highest worldwide standards (ISO 9001, ASTM, IP) and are regularly calibrated according to ISO/IEC 17025 standards to maintain accuracy and dependability. Our dedication lies in supporting innovation and guaranteeing safety through our instruments for various sectors such as research centers, petrochemical and mining industries, healthcare institutions, and environmental bodies.
Company Advantages
(1)Full-Chain Resource Integration Capability
(2)Professional Technical Service Team
(3)Rich Industry Practical Cases
(4)Reliable After-Sales Service
Service Guarantee
1. Online Training Services
If assistance is needed, we will provide online installation and commissioning services, as well as comprehensive operation training for you. Meanwhile, we also offer 24/7 online training support for end users throughout the year.
2. Professional After-Sales Service
According to the type of instrument, we can provide specialized maintenance services. Our goal is to become the highest-quality and most reliable instrument supplier in the market. We welcome your valuable opinions and suggestions to help us continuously improve our service quality.
Logistics and Shipping
Worldwide Shipping: We have extensive experience in shipping goods to Asia, Europe, the Middle East, and other regions.
Secure Packaging: Laboratory instruments are carefully packed to ensure they are properly secured and protected during transit.
International Certification
|
|
ISO 9001 Certification | ASTM Certificate |
