Sample adding

Example of a four-unit riffle. A sample added through the top is divided into four piles, two on each of the riffle s sides. 

Prepare a single multicomponent working standard from the stock standards by making appropriate dilutions with methanol. Concentrations in the working standards should be at such a level that a 20- xL sample added to 100 mL of water gives a calibration standard whose response for each trihalomethane is within 25% of that for the samples to be analyzed. 

Duration of Sample. When measuring a substance having an 8 h averaging time, a single 8 h sample or several consecutive samples adding up to 8 h is best (see Eig. 1). Short period grab samples are the least satisfactory. Eor a STEL, the method should be able to collect enough material to provide adequate sensitivity. 

To demonstrate the effect in more detail a series of experiments was carried out similar to that of volume overload, but in this case, the sample mass was increased in small increments. The retention distance of the front and the back of each peak was measured at the nominal points of inflection (0.6065 of the peak height) and the curves relating the retention data produced to the mass of sample added are shown in Figure 7. In Figure 7 the change in retention time with sample load is more obvious the maximum effect was to reduce the retention time of anthracene and the minimum effect was to the overloaded solute itself, benzene. Despite the reduction in retention time, the band width of anthracene is still little effected by the overloaded benzene. There is, however, a significant increase in the width of the naphthalene peak which... 

The temperature at the observed transition is the initial temperature of the sample added to the shock-compression heating, which is only 3 °C. Uncertainties in the change in Curie temperature are principally due to the measurement of Curie temperature at atmospheric pressure, which was found to... 

TABLE 26 Dishwashing Number of Samples Added to Defoam... 

The experimental procedure for conducting phase solubility analysis is rather simple it consists of mixing increasing amounts of sample with a fixed volume of solvent and then determining the mass of sample that has dissolved after each addition. It is not necessary to exceed the solubility limit of the analyte species, but attainment of this condition makes it easier to recognize trend within the plots. An experimental protocol for phase solubility analyses is available [39]. The data are most commonly plotted with the system composition (total mass of sample added per gram solvent) on the x axis, and the solution composition (mass of solute actually dissolved per gram of solvent) on the y axis. 

Sample Added/ mg kg Furaloxyl Found/ mg kg Recovery % Added/ mg kg Metalaxyl Found/ mg kg Recovery %... 

For sample volumes less than 2.5 ml, add equilibration buffer so that the combined volume of sample added in Step 5 and buffer added in Step 6 equals 2.5 ml. Allow the equilibration buffer to enter the gel bed completely. 

The methods are mathematically analogous to KAM and KSM. If the volume of the standard solution is Vo, the volume of the sample added is 1 (1 > V ), the standard concentration is c, that of the sample Cx and the reaction ratio between the standard sensed and the sample added is ju, then... 

Sample added to snbstrate and placed in cnp monnted on optical fiber... 

Sample Added Parasorbic Acid Ca(0H)2 Treatment Parasorbic Acid Found... 

Homogenization of sample (adding water if needed) and adsorption on activated Florisil to produce a free-flowing powder. Elution with ethyl acetate or methylene chloride. 

Spiked sample a sample added with a known amount of related substances, prepared from authentic samples during method development or validation. 

If a liquid form of the enzyme is added, such as lipases in broth samples from microbial cultures, calculate specific activity on a normalized basis by substituting a ml enzyme sample added (instead of mg protein) using the equation above. 

Repeat steps 1 to 6 with three new homogenized food samples, adding 1.5, 3.0, and 4.5 ml of 0.2 mM TMP, respectively, before step 2. In step 3, reduce the volume of ice-cold distilled water added to each pouch accordingly. 

Samples, added at mobile phase, are 347 stirred for 30 min in a vessel protected from light, and the supernatant is injected. 

Sample Added CF4 F 1 s peak BE and at.% of total peak area ... 

Sample Added sample concentration, mg/kg Mean analysis ), mg/kg Mean recovery, % Added sample concentration, mg/kg Mean analysis-), mg/kg Mean recovery, % Added sample concentration, mg/kg Mean analysis ), mg/kg Mean recovery, %... 

Carefully apply the sample (see Notes 4 and 5) to the column. The sample may be applied using gravity flow or with a peristaltic pump, but use care not to disrupt the gel in the column. Theoretically, there is no limit to the volume of sample added, but the sample amount should not exceed the binding capacity of the column. 

Repaglinide stock solution in MeOH then diluted with water Sample SPE continued with LLE Sample added with 250 ml water and 500 ml 0.1 ammonium acetate, then loaded on 1 ml Chem Elut extraction cartridge. LLE performed with 4 ml dicholorometane, dried, and reconstituted with 200 [A of mobile phase... 

LLE Sample added with 200 fi of 300 mM K2HP04 (pH 5) and 4 ml chloroform, then extracted. Dry residue obtained from the organic layer was reconstituted with 100 [A mobile phase... 

Standard stock standard in MeOH then diluted with MeOH water = 50 50 Sample LLE sample added with 500 [A of 50 mM ammonium acetate buffer (pH 6.8), then with 2 ml diethyl ether. Dried organic residue was reconstituted in 50 [A of 0.1% (v/v) formic acid in ACN then with 50 [A of 0.1% formic acid in water LOD not reported [50] LOQ 10 pg/ml Rec 61.5-68.6%... 

Plasma plasma sample added with 300 fA ACN then vortexed and centrifuged. Supernatant was then concentrated down using sample concentrator, then added with 5 fA of 10 g/ml i.s. and 10 fA TFA to form precipitation and centrifuged. The resultant supernatant was then injected Urine similar with the plasma... 

Determines analytical accuracy for each sample Added to every blank, field, and laboratory... 

Somebody gave you a sample of water from the Dead Sea containing about 70 g/L NaCl. Could you measure this amount of NaCl in a 50-mL sample adding the same amount of silver nitrate reagent used in this experiment (5 mL 0.01 N) ... 

In the main experiment, 16 dishes were evaluated using a panel consisted of 300 ordinary people with the panel size for each session being 25 to 50. Each panelist was given a test sample added MSG and a control. The panelists were asked to compare the test sample against the control, and to evaluate the flavor of the test sample checking off the point on each scale of the evaluation sheet. 

Haemolytic activity was observed in samples during Phaeocystis pouchetii blooms in mesocosms. The activity measured using incubations of whole mesocosm samples mixed with blood suspensions was proportional with the amount of sample added. The haemolytic activity in the mesocosms correlated best with the density of non-motile P. pouchetii but also with the abundance of the larger phototrophs and heterotrophs. The last two were also positively related to P. pouchetii numbers. Biomass during the P. pouchetii bloom was dominated by non-motile P. pouchetii cells and... 

C. Prior to extraction, 500 pL sample added with 10 pL i.s. then extracted with extracting solvent. Aliquot of the organic layer was injected and analyzed... 

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