Conductivity, pH, ORP, total dissolved solids (TDS), and dissolved oxygen (DO) were measured in situ using a professional plus multiparameter. Turbidity was measured in situ with a HACH 2100 Q turbidimeter. The equipment was previously calibrated with standard solutions. In the laboratory, dissolved organic carbon (DOC) concentrations were measured using a total organic carbon analyzer (TOC-L Shimadzu, Kyoto, Japan). The total suspended solids (TSS) were analyzed according to [24 ]. Water hardness was determined according to [25 ].
2100q turbidimeter
Manufactured by HACH
Sourced in United States
The 2100Q Turbidimeter is a laboratory instrument designed to measure the turbidity of water samples. It uses the nephelometric method to determine the turbidity, which is a measure of the cloudiness or haziness of the water caused by suspended particles. The 2100Q Turbidimeter provides accurate and reliable turbidity measurements, with a measurement range of 0 to 1000 NTU (Nephelometric Turbidity Units).
Automatically generated - may contain errors
Lab products found in correlation
5 protocols using 2100q turbidimeter
1
Comprehensive Water Quality Assessment
2
Nutrient Analysis of Hydroponic Lettuce
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TSS, TN, TP, BOD, and COD were determined by Eurofins laboratory, Norway. For TP and TN, the nutrients were dissolved by nitric acid microwave extraction and analyzed using ICP-OES according to European standards (DIN EN ISO 11885). Soluble nutrients (P, K, Cu, Zn, S, Mn, Mg, Ca, Mo, B, Fe) were analyzed using inductively coupled plasma optical emission spectrometry (ICP-HSP) according to accredited standards by the Eurofins laboratory, Netherlands. Leaf tissue was collected from different parts of the lettuces to avoid biases due to uneven nutrient distribution within the plants. The nutrients and metals were dissolved by nitric acid microwave extraction and analyzed by inductively coupled plasma atomic emission spectrometry (ICP-OES) according to European standards (DIN EN ISO 11885). Operational parameters including turbidity, pH, EC, and TSS of the nutrient solution were measured in the laboratory of University of Agder according to Norwegian and European standards. TSS was measured using pre-weighed 0.45 µm Whatman GF/C glass microfiber filters. Turbidity was determined using a calibrated Hach 2100Q turbidimeter (Loveland, CO, USA), while pH and EC were measured using a calibrated Hach HQ40d instrument with standard pH and EC sensors. All samples were stored in a refrigerator at 4 • C and sent immediately after sampling in insulated cooler bags to the laboratory.
3
Characterizing Treated and Untreated Cellulose Substrates
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Fourier transform
infrared (FT-IR)
spectra of CTS, CL-CTS, and PACTS at wavenumbers between 400–4000
cm–1 were measured using WQF-520 FT-IR spectrometer
(Beijing Beifen-ruili Analytical Instrument (Group) Co., Ltd., China).
Scanning electron microscopy (SEM) of CTS and PACTS was performed
using TSM-7900F (JEOL Ltd., Japan). X-ray diffraction (XRD) analysis
was performed using D/max-RB X-ray diffractometer (Rigaku, Japan)
operating at a voltage of 40 kV and current of 100 mA using Co Kα
radiation. The pH was measured using PHS-25 acidimeter (Shanghai Lei-ci
Instrument, China). The chemical oxygen demand (CODCr)
was measured using a COD rapid detector (DR1010 rapid detector and
DRB200 digestive machine, Hach, USA). Turbidity was determined using
a turbidimeter (2100Q Turbidimeter, Hach, USA). The conductivity was
measured at pre- and post-treatment stages using a conductivity detector
(Sension7, Hach, USA).
infrared (FT-IR)
spectra of CTS, CL-CTS, and PACTS at wavenumbers between 400–4000
cm–1 were measured using WQF-520 FT-IR spectrometer
(Beijing Beifen-ruili Analytical Instrument (Group) Co., Ltd., China).
Scanning electron microscopy (SEM) of CTS and PACTS was performed
using TSM-7900F (JEOL Ltd., Japan). X-ray diffraction (XRD) analysis
was performed using D/max-RB X-ray diffractometer (Rigaku, Japan)
operating at a voltage of 40 kV and current of 100 mA using Co Kα
radiation. The pH was measured using PHS-25 acidimeter (Shanghai Lei-ci
Instrument, China). The chemical oxygen demand (CODCr)
was measured using a COD rapid detector (DR1010 rapid detector and
DRB200 digestive machine, Hach, USA). Turbidity was determined using
a turbidimeter (2100Q Turbidimeter, Hach, USA). The conductivity was
measured at pre- and post-treatment stages using a conductivity detector
(Sension7, Hach, USA).
4
Spectrophotometric Analysis of Water Quality
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The phosphate concentration in all filtrates was analyzed using the molybdenum blue colorimetric method on an HACH DR600 spectrophotometer at a wavelength of 700 nm. The concentration of DOC was measured with a TOC-L CPH CN200 analyzer (Shimadzu, Japan). Turbidity was measured with a 2100Q turbidimeter (HACH Company, America). UV254 was measured with a standard method using a UV-5200 spectrophotometer at a wavelength of 254 nm with a 1 cm quartz cell.
5
Turbidity Measurement of Fruit Juice
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The direct turbidity of the juice expressed in nephelometric turbidity units (NTU) was tested using a 2100 Q turbidimeter from HACH Lange GmbH (Berlin, Germany) based on the instrument’s instructions, at a range of 0–2000 NTU. Before analyses, the turbidimeter was calibrated against standards, and temperature of juice samples was adjusted to 23 °C. The analysis was made by placing into device a glass cuvette filled with diluted juice.
The adopted method of Wang et al. [21 (link)] was used to measure turbidity of the juice serum. Briefly, 6 mL of juice was placed in 15 mL tubes and centrifuged (20 °C, 10 min, 4200× g) on an MPW–352R device (MPW Med. Instruments, Warsaw, Poland). The supernatant was transferred into optical glass cuvettes and its absorbance was analyzed using a Shimadzu UV-1650PC spectrophotometer (Shimadzu Corp., Kyoto, Japan) at a wavelength of 660 nm. The absorbance result was directly related to the serum cloudiness.
Both measurements were carried out in triplicate.
The adopted method of Wang et al. [21 (link)] was used to measure turbidity of the juice serum. Briefly, 6 mL of juice was placed in 15 mL tubes and centrifuged (20 °C, 10 min, 4200× g) on an MPW–352R device (MPW Med. Instruments, Warsaw, Poland). The supernatant was transferred into optical glass cuvettes and its absorbance was analyzed using a Shimadzu UV-1650PC spectrophotometer (Shimadzu Corp., Kyoto, Japan) at a wavelength of 660 nm. The absorbance result was directly related to the serum cloudiness.
Both measurements were carried out in triplicate.
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